Is my battery shot?
#51
Guest
Posts: n/a
Re: Is my battery shot?
This is a beautiful post.
On Wed, 02 Mar 2005 19:37:52 GMT, Rich Hampel <RhmpL33@nospam.net>
wrote:
>If you left the battery fully discharged for more than one or two days.
>take the battery to an auto-electric speicalty shop and have them
>'equalize' it. When you ask to have it done and the counter man has a
>strange look on his face, leave the shop.
>
>Equalization is controlled over-charging (at a precise voltage ... and
>correlated to actual battery temperature) will help to desulphanate the
>plates, Batteries that are left in a dead state for more than one to
>two days will sulphanate which will lead to premature battery failure.
>Equalization is done by applying a specific charge rate that causes the
>battery to 'boil'. Obviously dont do this yourself as you may explode
>the battery in the process, etc.
>
>A rapid fast full charge (turn the charger switch to 'manual' ), will
>sometimes be good enough. Do this outside and with plenty of 'space'
>so if the battery 'goes' noone gets hurt. Hook up charger, switch to
>manual, follow looooooong extension cord to power source and plug in.
>Dont even think of going near the battery when its fast manual charging
>in case it goes booooooom. Charge for about an hour, turn off charger
>and if battery is less than hot to touch, switch to automatic, etc.
>
>There are three stage solid state (expensive) external regulators that
>allow for equalization ... but again if you dont know what you are
>doing, you can get seriously hurt.
>
>In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
><neil.scott@adelphia.net> wrote:
>
>> The battery may survive. Suggest setting battery charger to 6 volt setting
>> and when charge rate drops below 2 amps set to 12 volts and continue to
>> charge.
>>
>> "Greg" <greglc84@hotmail.com> wrote in message
>> news:nBpUd.519892$8l.226545@pd7tw1no...
>> > I park my CJ in one of those 10'x20' grey plastic garages, was out
>> > wheeling last sunday, and obviously I forgot to turn off lights, battery
>> so
>> > dead not even a click, stuck camper battery in and on come lights. So
>> > question is, had CJ for 1 1/2 years, battery of unknown age, one of those
>> > ones with green lights, ( no green there today ), is it worth trying to
>> > charge it or is it shot? I've had dead batteries before, but not ones that
>> > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
>> > can come back from that.
>> >
>> >
>>
>>
--
Woodsy,
Off the Grid, Off the Road, Off my Rocker...
#52
Guest
Posts: n/a
Re: Is my battery shot?
This is a beautiful post.
On Wed, 02 Mar 2005 19:37:52 GMT, Rich Hampel <RhmpL33@nospam.net>
wrote:
>If you left the battery fully discharged for more than one or two days.
>take the battery to an auto-electric speicalty shop and have them
>'equalize' it. When you ask to have it done and the counter man has a
>strange look on his face, leave the shop.
>
>Equalization is controlled over-charging (at a precise voltage ... and
>correlated to actual battery temperature) will help to desulphanate the
>plates, Batteries that are left in a dead state for more than one to
>two days will sulphanate which will lead to premature battery failure.
>Equalization is done by applying a specific charge rate that causes the
>battery to 'boil'. Obviously dont do this yourself as you may explode
>the battery in the process, etc.
>
>A rapid fast full charge (turn the charger switch to 'manual' ), will
>sometimes be good enough. Do this outside and with plenty of 'space'
>so if the battery 'goes' noone gets hurt. Hook up charger, switch to
>manual, follow looooooong extension cord to power source and plug in.
>Dont even think of going near the battery when its fast manual charging
>in case it goes booooooom. Charge for about an hour, turn off charger
>and if battery is less than hot to touch, switch to automatic, etc.
>
>There are three stage solid state (expensive) external regulators that
>allow for equalization ... but again if you dont know what you are
>doing, you can get seriously hurt.
>
>In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
><neil.scott@adelphia.net> wrote:
>
>> The battery may survive. Suggest setting battery charger to 6 volt setting
>> and when charge rate drops below 2 amps set to 12 volts and continue to
>> charge.
>>
>> "Greg" <greglc84@hotmail.com> wrote in message
>> news:nBpUd.519892$8l.226545@pd7tw1no...
>> > I park my CJ in one of those 10'x20' grey plastic garages, was out
>> > wheeling last sunday, and obviously I forgot to turn off lights, battery
>> so
>> > dead not even a click, stuck camper battery in and on come lights. So
>> > question is, had CJ for 1 1/2 years, battery of unknown age, one of those
>> > ones with green lights, ( no green there today ), is it worth trying to
>> > charge it or is it shot? I've had dead batteries before, but not ones that
>> > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
>> > can come back from that.
>> >
>> >
>>
>>
--
Woodsy,
Off the Grid, Off the Road, Off my Rocker...
#53
Guest
Posts: n/a
Re: Is my battery shot?
I have designed and built such chargers for industrial and
instrumentation batteries - some the size of your Jeep - and there is
a caveat to all these processes: success rate even in lead-acid (or
Gel equivilants) designed for deep discharge is at best 75% for one
day sitting dead. That goes down rapidly with each day it sits.
After 4 days, getting even one back to a functional state is a
surprise. Also look at the cost and what you have even if it does
work. Sometimes it's cheaper and a lot more reliable to bite the
bullet and get a new one if there is any doubt.
On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
wrote:
> If you left the battery fully discharged for more than one or two days.
> take the battery to an auto-electric speicalty shop and have them
> 'equalize' it. When you ask to have it done and the counter man has a
> strange look on his face, leave the shop.
>
> Equalization is controlled over-charging (at a precise voltage ... and
> correlated to actual battery temperature) will help to desulphanate the
> plates, Batteries that are left in a dead state for more than one to
> two days will sulphanate which will lead to premature battery failure.
> Equalization is done by applying a specific charge rate that causes the
> battery to 'boil'. Obviously dont do this yourself as you may explode
> the battery in the process, etc.
>
> A rapid fast full charge (turn the charger switch to 'manual' ), will
> sometimes be good enough. Do this outside and with plenty of 'space'
> so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> manual, follow looooooong extension cord to power source and plug in.
> Dont even think of going near the battery when its fast manual charging
> in case it goes booooooom. Charge for about an hour, turn off charger
> and if battery is less than hot to touch, switch to automatic, etc.
>
> There are three stage solid state (expensive) external regulators that
> allow for equalization ... but again if you dont know what you are
> doing, you can get seriously hurt.
>
> In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> <neil.scott@adelphia.net> wrote:
>
> > The battery may survive. Suggest setting battery charger to 6 volt setting
> > and when charge rate drops below 2 amps set to 12 volts and continue to
> > charge.
> >
> > "Greg" <greglc84@hotmail.com> wrote in message
> > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > so
> > > dead not even a click, stuck camper battery in and on come lights. So
> > > question is, had CJ for 1 1/2 years, battery of unknown age, one of those
> > > ones with green lights, ( no green there today ), is it worth trying to
> > > charge it or is it shot? I've had dead batteries before, but not ones that
> > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > can come back from that.
> > >
> > >
> >
> >
--
Will Honea
instrumentation batteries - some the size of your Jeep - and there is
a caveat to all these processes: success rate even in lead-acid (or
Gel equivilants) designed for deep discharge is at best 75% for one
day sitting dead. That goes down rapidly with each day it sits.
After 4 days, getting even one back to a functional state is a
surprise. Also look at the cost and what you have even if it does
work. Sometimes it's cheaper and a lot more reliable to bite the
bullet and get a new one if there is any doubt.
On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
wrote:
> If you left the battery fully discharged for more than one or two days.
> take the battery to an auto-electric speicalty shop and have them
> 'equalize' it. When you ask to have it done and the counter man has a
> strange look on his face, leave the shop.
>
> Equalization is controlled over-charging (at a precise voltage ... and
> correlated to actual battery temperature) will help to desulphanate the
> plates, Batteries that are left in a dead state for more than one to
> two days will sulphanate which will lead to premature battery failure.
> Equalization is done by applying a specific charge rate that causes the
> battery to 'boil'. Obviously dont do this yourself as you may explode
> the battery in the process, etc.
>
> A rapid fast full charge (turn the charger switch to 'manual' ), will
> sometimes be good enough. Do this outside and with plenty of 'space'
> so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> manual, follow looooooong extension cord to power source and plug in.
> Dont even think of going near the battery when its fast manual charging
> in case it goes booooooom. Charge for about an hour, turn off charger
> and if battery is less than hot to touch, switch to automatic, etc.
>
> There are three stage solid state (expensive) external regulators that
> allow for equalization ... but again if you dont know what you are
> doing, you can get seriously hurt.
>
> In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> <neil.scott@adelphia.net> wrote:
>
> > The battery may survive. Suggest setting battery charger to 6 volt setting
> > and when charge rate drops below 2 amps set to 12 volts and continue to
> > charge.
> >
> > "Greg" <greglc84@hotmail.com> wrote in message
> > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > so
> > > dead not even a click, stuck camper battery in and on come lights. So
> > > question is, had CJ for 1 1/2 years, battery of unknown age, one of those
> > > ones with green lights, ( no green there today ), is it worth trying to
> > > charge it or is it shot? I've had dead batteries before, but not ones that
> > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > can come back from that.
> > >
> > >
> >
> >
--
Will Honea
#54
Guest
Posts: n/a
Re: Is my battery shot?
I have designed and built such chargers for industrial and
instrumentation batteries - some the size of your Jeep - and there is
a caveat to all these processes: success rate even in lead-acid (or
Gel equivilants) designed for deep discharge is at best 75% for one
day sitting dead. That goes down rapidly with each day it sits.
After 4 days, getting even one back to a functional state is a
surprise. Also look at the cost and what you have even if it does
work. Sometimes it's cheaper and a lot more reliable to bite the
bullet and get a new one if there is any doubt.
On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
wrote:
> If you left the battery fully discharged for more than one or two days.
> take the battery to an auto-electric speicalty shop and have them
> 'equalize' it. When you ask to have it done and the counter man has a
> strange look on his face, leave the shop.
>
> Equalization is controlled over-charging (at a precise voltage ... and
> correlated to actual battery temperature) will help to desulphanate the
> plates, Batteries that are left in a dead state for more than one to
> two days will sulphanate which will lead to premature battery failure.
> Equalization is done by applying a specific charge rate that causes the
> battery to 'boil'. Obviously dont do this yourself as you may explode
> the battery in the process, etc.
>
> A rapid fast full charge (turn the charger switch to 'manual' ), will
> sometimes be good enough. Do this outside and with plenty of 'space'
> so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> manual, follow looooooong extension cord to power source and plug in.
> Dont even think of going near the battery when its fast manual charging
> in case it goes booooooom. Charge for about an hour, turn off charger
> and if battery is less than hot to touch, switch to automatic, etc.
>
> There are three stage solid state (expensive) external regulators that
> allow for equalization ... but again if you dont know what you are
> doing, you can get seriously hurt.
>
> In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> <neil.scott@adelphia.net> wrote:
>
> > The battery may survive. Suggest setting battery charger to 6 volt setting
> > and when charge rate drops below 2 amps set to 12 volts and continue to
> > charge.
> >
> > "Greg" <greglc84@hotmail.com> wrote in message
> > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > so
> > > dead not even a click, stuck camper battery in and on come lights. So
> > > question is, had CJ for 1 1/2 years, battery of unknown age, one of those
> > > ones with green lights, ( no green there today ), is it worth trying to
> > > charge it or is it shot? I've had dead batteries before, but not ones that
> > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > can come back from that.
> > >
> > >
> >
> >
--
Will Honea
instrumentation batteries - some the size of your Jeep - and there is
a caveat to all these processes: success rate even in lead-acid (or
Gel equivilants) designed for deep discharge is at best 75% for one
day sitting dead. That goes down rapidly with each day it sits.
After 4 days, getting even one back to a functional state is a
surprise. Also look at the cost and what you have even if it does
work. Sometimes it's cheaper and a lot more reliable to bite the
bullet and get a new one if there is any doubt.
On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
wrote:
> If you left the battery fully discharged for more than one or two days.
> take the battery to an auto-electric speicalty shop and have them
> 'equalize' it. When you ask to have it done and the counter man has a
> strange look on his face, leave the shop.
>
> Equalization is controlled over-charging (at a precise voltage ... and
> correlated to actual battery temperature) will help to desulphanate the
> plates, Batteries that are left in a dead state for more than one to
> two days will sulphanate which will lead to premature battery failure.
> Equalization is done by applying a specific charge rate that causes the
> battery to 'boil'. Obviously dont do this yourself as you may explode
> the battery in the process, etc.
>
> A rapid fast full charge (turn the charger switch to 'manual' ), will
> sometimes be good enough. Do this outside and with plenty of 'space'
> so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> manual, follow looooooong extension cord to power source and plug in.
> Dont even think of going near the battery when its fast manual charging
> in case it goes booooooom. Charge for about an hour, turn off charger
> and if battery is less than hot to touch, switch to automatic, etc.
>
> There are three stage solid state (expensive) external regulators that
> allow for equalization ... but again if you dont know what you are
> doing, you can get seriously hurt.
>
> In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> <neil.scott@adelphia.net> wrote:
>
> > The battery may survive. Suggest setting battery charger to 6 volt setting
> > and when charge rate drops below 2 amps set to 12 volts and continue to
> > charge.
> >
> > "Greg" <greglc84@hotmail.com> wrote in message
> > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > so
> > > dead not even a click, stuck camper battery in and on come lights. So
> > > question is, had CJ for 1 1/2 years, battery of unknown age, one of those
> > > ones with green lights, ( no green there today ), is it worth trying to
> > > charge it or is it shot? I've had dead batteries before, but not ones that
> > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > can come back from that.
> > >
> > >
> >
> >
--
Will Honea
#55
Guest
Posts: n/a
Re: Is my battery shot?
I have designed and built such chargers for industrial and
instrumentation batteries - some the size of your Jeep - and there is
a caveat to all these processes: success rate even in lead-acid (or
Gel equivilants) designed for deep discharge is at best 75% for one
day sitting dead. That goes down rapidly with each day it sits.
After 4 days, getting even one back to a functional state is a
surprise. Also look at the cost and what you have even if it does
work. Sometimes it's cheaper and a lot more reliable to bite the
bullet and get a new one if there is any doubt.
On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
wrote:
> If you left the battery fully discharged for more than one or two days.
> take the battery to an auto-electric speicalty shop and have them
> 'equalize' it. When you ask to have it done and the counter man has a
> strange look on his face, leave the shop.
>
> Equalization is controlled over-charging (at a precise voltage ... and
> correlated to actual battery temperature) will help to desulphanate the
> plates, Batteries that are left in a dead state for more than one to
> two days will sulphanate which will lead to premature battery failure.
> Equalization is done by applying a specific charge rate that causes the
> battery to 'boil'. Obviously dont do this yourself as you may explode
> the battery in the process, etc.
>
> A rapid fast full charge (turn the charger switch to 'manual' ), will
> sometimes be good enough. Do this outside and with plenty of 'space'
> so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> manual, follow looooooong extension cord to power source and plug in.
> Dont even think of going near the battery when its fast manual charging
> in case it goes booooooom. Charge for about an hour, turn off charger
> and if battery is less than hot to touch, switch to automatic, etc.
>
> There are three stage solid state (expensive) external regulators that
> allow for equalization ... but again if you dont know what you are
> doing, you can get seriously hurt.
>
> In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> <neil.scott@adelphia.net> wrote:
>
> > The battery may survive. Suggest setting battery charger to 6 volt setting
> > and when charge rate drops below 2 amps set to 12 volts and continue to
> > charge.
> >
> > "Greg" <greglc84@hotmail.com> wrote in message
> > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > so
> > > dead not even a click, stuck camper battery in and on come lights. So
> > > question is, had CJ for 1 1/2 years, battery of unknown age, one of those
> > > ones with green lights, ( no green there today ), is it worth trying to
> > > charge it or is it shot? I've had dead batteries before, but not ones that
> > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > can come back from that.
> > >
> > >
> >
> >
--
Will Honea
instrumentation batteries - some the size of your Jeep - and there is
a caveat to all these processes: success rate even in lead-acid (or
Gel equivilants) designed for deep discharge is at best 75% for one
day sitting dead. That goes down rapidly with each day it sits.
After 4 days, getting even one back to a functional state is a
surprise. Also look at the cost and what you have even if it does
work. Sometimes it's cheaper and a lot more reliable to bite the
bullet and get a new one if there is any doubt.
On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
wrote:
> If you left the battery fully discharged for more than one or two days.
> take the battery to an auto-electric speicalty shop and have them
> 'equalize' it. When you ask to have it done and the counter man has a
> strange look on his face, leave the shop.
>
> Equalization is controlled over-charging (at a precise voltage ... and
> correlated to actual battery temperature) will help to desulphanate the
> plates, Batteries that are left in a dead state for more than one to
> two days will sulphanate which will lead to premature battery failure.
> Equalization is done by applying a specific charge rate that causes the
> battery to 'boil'. Obviously dont do this yourself as you may explode
> the battery in the process, etc.
>
> A rapid fast full charge (turn the charger switch to 'manual' ), will
> sometimes be good enough. Do this outside and with plenty of 'space'
> so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> manual, follow looooooong extension cord to power source and plug in.
> Dont even think of going near the battery when its fast manual charging
> in case it goes booooooom. Charge for about an hour, turn off charger
> and if battery is less than hot to touch, switch to automatic, etc.
>
> There are three stage solid state (expensive) external regulators that
> allow for equalization ... but again if you dont know what you are
> doing, you can get seriously hurt.
>
> In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> <neil.scott@adelphia.net> wrote:
>
> > The battery may survive. Suggest setting battery charger to 6 volt setting
> > and when charge rate drops below 2 amps set to 12 volts and continue to
> > charge.
> >
> > "Greg" <greglc84@hotmail.com> wrote in message
> > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > so
> > > dead not even a click, stuck camper battery in and on come lights. So
> > > question is, had CJ for 1 1/2 years, battery of unknown age, one of those
> > > ones with green lights, ( no green there today ), is it worth trying to
> > > charge it or is it shot? I've had dead batteries before, but not ones that
> > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > can come back from that.
> > >
> > >
> >
> >
--
Will Honea
#56
Guest
Posts: n/a
Re: Is my battery shot?
But you cant equalize a gel battery ... or you blow out the pressure
valve. I simply turn them upside down and slow charge them back to
recovery.
In article <JxX2tWiP5BNp-pn2-GqEYlVzZGVkc@anon.none.net>, Will Honea
<whonea@yahoo.com> wrote:
> I have designed and built such chargers for industrial and
> instrumentation batteries - some the size of your Jeep - and there is
> a caveat to all these processes: success rate even in lead-acid (or
> Gel equivilants) designed for deep discharge is at best 75% for one
> day sitting dead. That goes down rapidly with each day it sits.
> After 4 days, getting even one back to a functional state is a
> surprise. Also look at the cost and what you have even if it does
> work. Sometimes it's cheaper and a lot more reliable to bite the
> bullet and get a new one if there is any doubt.
>
> On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
> wrote:
>
> > If you left the battery fully discharged for more than one or two days.
> > take the battery to an auto-electric speicalty shop and have them
> > 'equalize' it. When you ask to have it done and the counter man has a
> > strange look on his face, leave the shop.
> >
> > Equalization is controlled over-charging (at a precise voltage ... and
> > correlated to actual battery temperature) will help to desulphanate the
> > plates, Batteries that are left in a dead state for more than one to
> > two days will sulphanate which will lead to premature battery failure.
> > Equalization is done by applying a specific charge rate that causes the
> > battery to 'boil'. Obviously dont do this yourself as you may explode
> > the battery in the process, etc.
> >
> > A rapid fast full charge (turn the charger switch to 'manual' ), will
> > sometimes be good enough. Do this outside and with plenty of 'space'
> > so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> > manual, follow looooooong extension cord to power source and plug in.
> > Dont even think of going near the battery when its fast manual charging
> > in case it goes booooooom. Charge for about an hour, turn off charger
> > and if battery is less than hot to touch, switch to automatic, etc.
> >
> > There are three stage solid state (expensive) external regulators that
> > allow for equalization ... but again if you dont know what you are
> > doing, you can get seriously hurt.
> >
> > In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> > <neil.scott@adelphia.net> wrote:
> >
> > > The battery may survive. Suggest setting battery charger to 6 volt setting
> > > and when charge rate drops below 2 amps set to 12 volts and continue to
> > > charge.
> > >
> > > "Greg" <greglc84@hotmail.com> wrote in message
> > > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > > so
> > > > dead not even a click, stuck camper battery in and on come lights. So
> > > > question is, had CJ for 1 1/2 years, battery of unknown age, one of
> > > > those
> > > > ones with green lights, ( no green there today ), is it worth trying to
> > > > charge it or is it shot? I've had dead batteries before, but not ones
> > > > that
> > > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > > can come back from that.
> > > >
> > > >
> > >
> > >
valve. I simply turn them upside down and slow charge them back to
recovery.
In article <JxX2tWiP5BNp-pn2-GqEYlVzZGVkc@anon.none.net>, Will Honea
<whonea@yahoo.com> wrote:
> I have designed and built such chargers for industrial and
> instrumentation batteries - some the size of your Jeep - and there is
> a caveat to all these processes: success rate even in lead-acid (or
> Gel equivilants) designed for deep discharge is at best 75% for one
> day sitting dead. That goes down rapidly with each day it sits.
> After 4 days, getting even one back to a functional state is a
> surprise. Also look at the cost and what you have even if it does
> work. Sometimes it's cheaper and a lot more reliable to bite the
> bullet and get a new one if there is any doubt.
>
> On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
> wrote:
>
> > If you left the battery fully discharged for more than one or two days.
> > take the battery to an auto-electric speicalty shop and have them
> > 'equalize' it. When you ask to have it done and the counter man has a
> > strange look on his face, leave the shop.
> >
> > Equalization is controlled over-charging (at a precise voltage ... and
> > correlated to actual battery temperature) will help to desulphanate the
> > plates, Batteries that are left in a dead state for more than one to
> > two days will sulphanate which will lead to premature battery failure.
> > Equalization is done by applying a specific charge rate that causes the
> > battery to 'boil'. Obviously dont do this yourself as you may explode
> > the battery in the process, etc.
> >
> > A rapid fast full charge (turn the charger switch to 'manual' ), will
> > sometimes be good enough. Do this outside and with plenty of 'space'
> > so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> > manual, follow looooooong extension cord to power source and plug in.
> > Dont even think of going near the battery when its fast manual charging
> > in case it goes booooooom. Charge for about an hour, turn off charger
> > and if battery is less than hot to touch, switch to automatic, etc.
> >
> > There are three stage solid state (expensive) external regulators that
> > allow for equalization ... but again if you dont know what you are
> > doing, you can get seriously hurt.
> >
> > In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> > <neil.scott@adelphia.net> wrote:
> >
> > > The battery may survive. Suggest setting battery charger to 6 volt setting
> > > and when charge rate drops below 2 amps set to 12 volts and continue to
> > > charge.
> > >
> > > "Greg" <greglc84@hotmail.com> wrote in message
> > > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > > so
> > > > dead not even a click, stuck camper battery in and on come lights. So
> > > > question is, had CJ for 1 1/2 years, battery of unknown age, one of
> > > > those
> > > > ones with green lights, ( no green there today ), is it worth trying to
> > > > charge it or is it shot? I've had dead batteries before, but not ones
> > > > that
> > > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > > can come back from that.
> > > >
> > > >
> > >
> > >
#57
Guest
Posts: n/a
Re: Is my battery shot?
But you cant equalize a gel battery ... or you blow out the pressure
valve. I simply turn them upside down and slow charge them back to
recovery.
In article <JxX2tWiP5BNp-pn2-GqEYlVzZGVkc@anon.none.net>, Will Honea
<whonea@yahoo.com> wrote:
> I have designed and built such chargers for industrial and
> instrumentation batteries - some the size of your Jeep - and there is
> a caveat to all these processes: success rate even in lead-acid (or
> Gel equivilants) designed for deep discharge is at best 75% for one
> day sitting dead. That goes down rapidly with each day it sits.
> After 4 days, getting even one back to a functional state is a
> surprise. Also look at the cost and what you have even if it does
> work. Sometimes it's cheaper and a lot more reliable to bite the
> bullet and get a new one if there is any doubt.
>
> On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
> wrote:
>
> > If you left the battery fully discharged for more than one or two days.
> > take the battery to an auto-electric speicalty shop and have them
> > 'equalize' it. When you ask to have it done and the counter man has a
> > strange look on his face, leave the shop.
> >
> > Equalization is controlled over-charging (at a precise voltage ... and
> > correlated to actual battery temperature) will help to desulphanate the
> > plates, Batteries that are left in a dead state for more than one to
> > two days will sulphanate which will lead to premature battery failure.
> > Equalization is done by applying a specific charge rate that causes the
> > battery to 'boil'. Obviously dont do this yourself as you may explode
> > the battery in the process, etc.
> >
> > A rapid fast full charge (turn the charger switch to 'manual' ), will
> > sometimes be good enough. Do this outside and with plenty of 'space'
> > so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> > manual, follow looooooong extension cord to power source and plug in.
> > Dont even think of going near the battery when its fast manual charging
> > in case it goes booooooom. Charge for about an hour, turn off charger
> > and if battery is less than hot to touch, switch to automatic, etc.
> >
> > There are three stage solid state (expensive) external regulators that
> > allow for equalization ... but again if you dont know what you are
> > doing, you can get seriously hurt.
> >
> > In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> > <neil.scott@adelphia.net> wrote:
> >
> > > The battery may survive. Suggest setting battery charger to 6 volt setting
> > > and when charge rate drops below 2 amps set to 12 volts and continue to
> > > charge.
> > >
> > > "Greg" <greglc84@hotmail.com> wrote in message
> > > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > > so
> > > > dead not even a click, stuck camper battery in and on come lights. So
> > > > question is, had CJ for 1 1/2 years, battery of unknown age, one of
> > > > those
> > > > ones with green lights, ( no green there today ), is it worth trying to
> > > > charge it or is it shot? I've had dead batteries before, but not ones
> > > > that
> > > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > > can come back from that.
> > > >
> > > >
> > >
> > >
valve. I simply turn them upside down and slow charge them back to
recovery.
In article <JxX2tWiP5BNp-pn2-GqEYlVzZGVkc@anon.none.net>, Will Honea
<whonea@yahoo.com> wrote:
> I have designed and built such chargers for industrial and
> instrumentation batteries - some the size of your Jeep - and there is
> a caveat to all these processes: success rate even in lead-acid (or
> Gel equivilants) designed for deep discharge is at best 75% for one
> day sitting dead. That goes down rapidly with each day it sits.
> After 4 days, getting even one back to a functional state is a
> surprise. Also look at the cost and what you have even if it does
> work. Sometimes it's cheaper and a lot more reliable to bite the
> bullet and get a new one if there is any doubt.
>
> On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
> wrote:
>
> > If you left the battery fully discharged for more than one or two days.
> > take the battery to an auto-electric speicalty shop and have them
> > 'equalize' it. When you ask to have it done and the counter man has a
> > strange look on his face, leave the shop.
> >
> > Equalization is controlled over-charging (at a precise voltage ... and
> > correlated to actual battery temperature) will help to desulphanate the
> > plates, Batteries that are left in a dead state for more than one to
> > two days will sulphanate which will lead to premature battery failure.
> > Equalization is done by applying a specific charge rate that causes the
> > battery to 'boil'. Obviously dont do this yourself as you may explode
> > the battery in the process, etc.
> >
> > A rapid fast full charge (turn the charger switch to 'manual' ), will
> > sometimes be good enough. Do this outside and with plenty of 'space'
> > so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> > manual, follow looooooong extension cord to power source and plug in.
> > Dont even think of going near the battery when its fast manual charging
> > in case it goes booooooom. Charge for about an hour, turn off charger
> > and if battery is less than hot to touch, switch to automatic, etc.
> >
> > There are three stage solid state (expensive) external regulators that
> > allow for equalization ... but again if you dont know what you are
> > doing, you can get seriously hurt.
> >
> > In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> > <neil.scott@adelphia.net> wrote:
> >
> > > The battery may survive. Suggest setting battery charger to 6 volt setting
> > > and when charge rate drops below 2 amps set to 12 volts and continue to
> > > charge.
> > >
> > > "Greg" <greglc84@hotmail.com> wrote in message
> > > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > > so
> > > > dead not even a click, stuck camper battery in and on come lights. So
> > > > question is, had CJ for 1 1/2 years, battery of unknown age, one of
> > > > those
> > > > ones with green lights, ( no green there today ), is it worth trying to
> > > > charge it or is it shot? I've had dead batteries before, but not ones
> > > > that
> > > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > > can come back from that.
> > > >
> > > >
> > >
> > >
#58
Guest
Posts: n/a
Re: Is my battery shot?
But you cant equalize a gel battery ... or you blow out the pressure
valve. I simply turn them upside down and slow charge them back to
recovery.
In article <JxX2tWiP5BNp-pn2-GqEYlVzZGVkc@anon.none.net>, Will Honea
<whonea@yahoo.com> wrote:
> I have designed and built such chargers for industrial and
> instrumentation batteries - some the size of your Jeep - and there is
> a caveat to all these processes: success rate even in lead-acid (or
> Gel equivilants) designed for deep discharge is at best 75% for one
> day sitting dead. That goes down rapidly with each day it sits.
> After 4 days, getting even one back to a functional state is a
> surprise. Also look at the cost and what you have even if it does
> work. Sometimes it's cheaper and a lot more reliable to bite the
> bullet and get a new one if there is any doubt.
>
> On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
> wrote:
>
> > If you left the battery fully discharged for more than one or two days.
> > take the battery to an auto-electric speicalty shop and have them
> > 'equalize' it. When you ask to have it done and the counter man has a
> > strange look on his face, leave the shop.
> >
> > Equalization is controlled over-charging (at a precise voltage ... and
> > correlated to actual battery temperature) will help to desulphanate the
> > plates, Batteries that are left in a dead state for more than one to
> > two days will sulphanate which will lead to premature battery failure.
> > Equalization is done by applying a specific charge rate that causes the
> > battery to 'boil'. Obviously dont do this yourself as you may explode
> > the battery in the process, etc.
> >
> > A rapid fast full charge (turn the charger switch to 'manual' ), will
> > sometimes be good enough. Do this outside and with plenty of 'space'
> > so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> > manual, follow looooooong extension cord to power source and plug in.
> > Dont even think of going near the battery when its fast manual charging
> > in case it goes booooooom. Charge for about an hour, turn off charger
> > and if battery is less than hot to touch, switch to automatic, etc.
> >
> > There are three stage solid state (expensive) external regulators that
> > allow for equalization ... but again if you dont know what you are
> > doing, you can get seriously hurt.
> >
> > In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> > <neil.scott@adelphia.net> wrote:
> >
> > > The battery may survive. Suggest setting battery charger to 6 volt setting
> > > and when charge rate drops below 2 amps set to 12 volts and continue to
> > > charge.
> > >
> > > "Greg" <greglc84@hotmail.com> wrote in message
> > > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > > so
> > > > dead not even a click, stuck camper battery in and on come lights. So
> > > > question is, had CJ for 1 1/2 years, battery of unknown age, one of
> > > > those
> > > > ones with green lights, ( no green there today ), is it worth trying to
> > > > charge it or is it shot? I've had dead batteries before, but not ones
> > > > that
> > > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > > can come back from that.
> > > >
> > > >
> > >
> > >
valve. I simply turn them upside down and slow charge them back to
recovery.
In article <JxX2tWiP5BNp-pn2-GqEYlVzZGVkc@anon.none.net>, Will Honea
<whonea@yahoo.com> wrote:
> I have designed and built such chargers for industrial and
> instrumentation batteries - some the size of your Jeep - and there is
> a caveat to all these processes: success rate even in lead-acid (or
> Gel equivilants) designed for deep discharge is at best 75% for one
> day sitting dead. That goes down rapidly with each day it sits.
> After 4 days, getting even one back to a functional state is a
> surprise. Also look at the cost and what you have even if it does
> work. Sometimes it's cheaper and a lot more reliable to bite the
> bullet and get a new one if there is any doubt.
>
> On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
> wrote:
>
> > If you left the battery fully discharged for more than one or two days.
> > take the battery to an auto-electric speicalty shop and have them
> > 'equalize' it. When you ask to have it done and the counter man has a
> > strange look on his face, leave the shop.
> >
> > Equalization is controlled over-charging (at a precise voltage ... and
> > correlated to actual battery temperature) will help to desulphanate the
> > plates, Batteries that are left in a dead state for more than one to
> > two days will sulphanate which will lead to premature battery failure.
> > Equalization is done by applying a specific charge rate that causes the
> > battery to 'boil'. Obviously dont do this yourself as you may explode
> > the battery in the process, etc.
> >
> > A rapid fast full charge (turn the charger switch to 'manual' ), will
> > sometimes be good enough. Do this outside and with plenty of 'space'
> > so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> > manual, follow looooooong extension cord to power source and plug in.
> > Dont even think of going near the battery when its fast manual charging
> > in case it goes booooooom. Charge for about an hour, turn off charger
> > and if battery is less than hot to touch, switch to automatic, etc.
> >
> > There are three stage solid state (expensive) external regulators that
> > allow for equalization ... but again if you dont know what you are
> > doing, you can get seriously hurt.
> >
> > In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> > <neil.scott@adelphia.net> wrote:
> >
> > > The battery may survive. Suggest setting battery charger to 6 volt setting
> > > and when charge rate drops below 2 amps set to 12 volts and continue to
> > > charge.
> > >
> > > "Greg" <greglc84@hotmail.com> wrote in message
> > > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > > so
> > > > dead not even a click, stuck camper battery in and on come lights. So
> > > > question is, had CJ for 1 1/2 years, battery of unknown age, one of
> > > > those
> > > > ones with green lights, ( no green there today ), is it worth trying to
> > > > charge it or is it shot? I've had dead batteries before, but not ones
> > > > that
> > > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > > can come back from that.
> > > >
> > > >
> > >
> > >
#59
Guest
Posts: n/a
Re: Is my battery shot?
The stuff I was building the chargers for didn't have the luxury of
getting the last gasp out of a battery - we had minimum backup life we
had to guarentee. Most of mine would try a rescue then run a
controlled discharge to measure capacity followed by a leakage run.
It the controller reported failure of either one it notified a control
center and a replacement was scheduled. After several years of
messing with this stuff we wound up using very high current spikes
followed by a cooling period for the initial recharge. The protocol
varied with the battery, but it was something like 100 msec at 10x
rated charge current using a 5% duty cycle. Fun stuff - got to spray
batteries all over a test cell <g>. Made me very cautious around
charging batteries.
On Thu, 3 Mar 2005 18:03:18 UTC Rich Hampel <RhmpL33@nospam.net>
wrote:
> But you cant equalize a gel battery ... or you blow out the pressure
> valve. I simply turn them upside down and slow charge them back to
> recovery.
>
> In article <JxX2tWiP5BNp-pn2-GqEYlVzZGVkc@anon.none.net>, Will Honea
> <whonea@yahoo.com> wrote:
>
> > I have designed and built such chargers for industrial and
> > instrumentation batteries - some the size of your Jeep - and there is
> > a caveat to all these processes: success rate even in lead-acid (or
> > Gel equivilants) designed for deep discharge is at best 75% for one
> > day sitting dead. That goes down rapidly with each day it sits.
> > After 4 days, getting even one back to a functional state is a
> > surprise. Also look at the cost and what you have even if it does
> > work. Sometimes it's cheaper and a lot more reliable to bite the
> > bullet and get a new one if there is any doubt.
> >
> > On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
> > wrote:
> >
> > > If you left the battery fully discharged for more than one or two days.
> > > take the battery to an auto-electric speicalty shop and have them
> > > 'equalize' it. When you ask to have it done and the counter man has a
> > > strange look on his face, leave the shop.
> > >
> > > Equalization is controlled over-charging (at a precise voltage ... and
> > > correlated to actual battery temperature) will help to desulphanate the
> > > plates, Batteries that are left in a dead state for more than one to
> > > two days will sulphanate which will lead to premature battery failure.
> > > Equalization is done by applying a specific charge rate that causes the
> > > battery to 'boil'. Obviously dont do this yourself as you may explode
> > > the battery in the process, etc.
> > >
> > > A rapid fast full charge (turn the charger switch to 'manual' ), will
> > > sometimes be good enough. Do this outside and with plenty of 'space'
> > > so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> > > manual, follow looooooong extension cord to power source and plug in.
> > > Dont even think of going near the battery when its fast manual charging
> > > in case it goes booooooom. Charge for about an hour, turn off charger
> > > and if battery is less than hot to touch, switch to automatic, etc.
> > >
> > > There are three stage solid state (expensive) external regulators that
> > > allow for equalization ... but again if you dont know what you are
> > > doing, you can get seriously hurt.
> > >
> > > In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> > > <neil.scott@adelphia.net> wrote:
> > >
> > > > The battery may survive. Suggest setting battery charger to 6 volt setting
> > > > and when charge rate drops below 2 amps set to 12 volts and continue to
> > > > charge.
> > > >
> > > > "Greg" <greglc84@hotmail.com> wrote in message
> > > > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > > > so
> > > > > dead not even a click, stuck camper battery in and on come lights. So
> > > > > question is, had CJ for 1 1/2 years, battery of unknown age, one of
> > > > > those
> > > > > ones with green lights, ( no green there today ), is it worth trying to
> > > > > charge it or is it shot? I've had dead batteries before, but not ones
> > > > > that
> > > > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > > > can come back from that.
> > > > >
> > > > >
> > > >
> > > >
--
Will Honea
getting the last gasp out of a battery - we had minimum backup life we
had to guarentee. Most of mine would try a rescue then run a
controlled discharge to measure capacity followed by a leakage run.
It the controller reported failure of either one it notified a control
center and a replacement was scheduled. After several years of
messing with this stuff we wound up using very high current spikes
followed by a cooling period for the initial recharge. The protocol
varied with the battery, but it was something like 100 msec at 10x
rated charge current using a 5% duty cycle. Fun stuff - got to spray
batteries all over a test cell <g>. Made me very cautious around
charging batteries.
On Thu, 3 Mar 2005 18:03:18 UTC Rich Hampel <RhmpL33@nospam.net>
wrote:
> But you cant equalize a gel battery ... or you blow out the pressure
> valve. I simply turn them upside down and slow charge them back to
> recovery.
>
> In article <JxX2tWiP5BNp-pn2-GqEYlVzZGVkc@anon.none.net>, Will Honea
> <whonea@yahoo.com> wrote:
>
> > I have designed and built such chargers for industrial and
> > instrumentation batteries - some the size of your Jeep - and there is
> > a caveat to all these processes: success rate even in lead-acid (or
> > Gel equivilants) designed for deep discharge is at best 75% for one
> > day sitting dead. That goes down rapidly with each day it sits.
> > After 4 days, getting even one back to a functional state is a
> > surprise. Also look at the cost and what you have even if it does
> > work. Sometimes it's cheaper and a lot more reliable to bite the
> > bullet and get a new one if there is any doubt.
> >
> > On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
> > wrote:
> >
> > > If you left the battery fully discharged for more than one or two days.
> > > take the battery to an auto-electric speicalty shop and have them
> > > 'equalize' it. When you ask to have it done and the counter man has a
> > > strange look on his face, leave the shop.
> > >
> > > Equalization is controlled over-charging (at a precise voltage ... and
> > > correlated to actual battery temperature) will help to desulphanate the
> > > plates, Batteries that are left in a dead state for more than one to
> > > two days will sulphanate which will lead to premature battery failure.
> > > Equalization is done by applying a specific charge rate that causes the
> > > battery to 'boil'. Obviously dont do this yourself as you may explode
> > > the battery in the process, etc.
> > >
> > > A rapid fast full charge (turn the charger switch to 'manual' ), will
> > > sometimes be good enough. Do this outside and with plenty of 'space'
> > > so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> > > manual, follow looooooong extension cord to power source and plug in.
> > > Dont even think of going near the battery when its fast manual charging
> > > in case it goes booooooom. Charge for about an hour, turn off charger
> > > and if battery is less than hot to touch, switch to automatic, etc.
> > >
> > > There are three stage solid state (expensive) external regulators that
> > > allow for equalization ... but again if you dont know what you are
> > > doing, you can get seriously hurt.
> > >
> > > In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> > > <neil.scott@adelphia.net> wrote:
> > >
> > > > The battery may survive. Suggest setting battery charger to 6 volt setting
> > > > and when charge rate drops below 2 amps set to 12 volts and continue to
> > > > charge.
> > > >
> > > > "Greg" <greglc84@hotmail.com> wrote in message
> > > > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > > > so
> > > > > dead not even a click, stuck camper battery in and on come lights. So
> > > > > question is, had CJ for 1 1/2 years, battery of unknown age, one of
> > > > > those
> > > > > ones with green lights, ( no green there today ), is it worth trying to
> > > > > charge it or is it shot? I've had dead batteries before, but not ones
> > > > > that
> > > > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > > > can come back from that.
> > > > >
> > > > >
> > > >
> > > >
--
Will Honea
#60
Guest
Posts: n/a
Re: Is my battery shot?
The stuff I was building the chargers for didn't have the luxury of
getting the last gasp out of a battery - we had minimum backup life we
had to guarentee. Most of mine would try a rescue then run a
controlled discharge to measure capacity followed by a leakage run.
It the controller reported failure of either one it notified a control
center and a replacement was scheduled. After several years of
messing with this stuff we wound up using very high current spikes
followed by a cooling period for the initial recharge. The protocol
varied with the battery, but it was something like 100 msec at 10x
rated charge current using a 5% duty cycle. Fun stuff - got to spray
batteries all over a test cell <g>. Made me very cautious around
charging batteries.
On Thu, 3 Mar 2005 18:03:18 UTC Rich Hampel <RhmpL33@nospam.net>
wrote:
> But you cant equalize a gel battery ... or you blow out the pressure
> valve. I simply turn them upside down and slow charge them back to
> recovery.
>
> In article <JxX2tWiP5BNp-pn2-GqEYlVzZGVkc@anon.none.net>, Will Honea
> <whonea@yahoo.com> wrote:
>
> > I have designed and built such chargers for industrial and
> > instrumentation batteries - some the size of your Jeep - and there is
> > a caveat to all these processes: success rate even in lead-acid (or
> > Gel equivilants) designed for deep discharge is at best 75% for one
> > day sitting dead. That goes down rapidly with each day it sits.
> > After 4 days, getting even one back to a functional state is a
> > surprise. Also look at the cost and what you have even if it does
> > work. Sometimes it's cheaper and a lot more reliable to bite the
> > bullet and get a new one if there is any doubt.
> >
> > On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
> > wrote:
> >
> > > If you left the battery fully discharged for more than one or two days.
> > > take the battery to an auto-electric speicalty shop and have them
> > > 'equalize' it. When you ask to have it done and the counter man has a
> > > strange look on his face, leave the shop.
> > >
> > > Equalization is controlled over-charging (at a precise voltage ... and
> > > correlated to actual battery temperature) will help to desulphanate the
> > > plates, Batteries that are left in a dead state for more than one to
> > > two days will sulphanate which will lead to premature battery failure.
> > > Equalization is done by applying a specific charge rate that causes the
> > > battery to 'boil'. Obviously dont do this yourself as you may explode
> > > the battery in the process, etc.
> > >
> > > A rapid fast full charge (turn the charger switch to 'manual' ), will
> > > sometimes be good enough. Do this outside and with plenty of 'space'
> > > so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> > > manual, follow looooooong extension cord to power source and plug in.
> > > Dont even think of going near the battery when its fast manual charging
> > > in case it goes booooooom. Charge for about an hour, turn off charger
> > > and if battery is less than hot to touch, switch to automatic, etc.
> > >
> > > There are three stage solid state (expensive) external regulators that
> > > allow for equalization ... but again if you dont know what you are
> > > doing, you can get seriously hurt.
> > >
> > > In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> > > <neil.scott@adelphia.net> wrote:
> > >
> > > > The battery may survive. Suggest setting battery charger to 6 volt setting
> > > > and when charge rate drops below 2 amps set to 12 volts and continue to
> > > > charge.
> > > >
> > > > "Greg" <greglc84@hotmail.com> wrote in message
> > > > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > > > so
> > > > > dead not even a click, stuck camper battery in and on come lights. So
> > > > > question is, had CJ for 1 1/2 years, battery of unknown age, one of
> > > > > those
> > > > > ones with green lights, ( no green there today ), is it worth trying to
> > > > > charge it or is it shot? I've had dead batteries before, but not ones
> > > > > that
> > > > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > > > can come back from that.
> > > > >
> > > > >
> > > >
> > > >
--
Will Honea
getting the last gasp out of a battery - we had minimum backup life we
had to guarentee. Most of mine would try a rescue then run a
controlled discharge to measure capacity followed by a leakage run.
It the controller reported failure of either one it notified a control
center and a replacement was scheduled. After several years of
messing with this stuff we wound up using very high current spikes
followed by a cooling period for the initial recharge. The protocol
varied with the battery, but it was something like 100 msec at 10x
rated charge current using a 5% duty cycle. Fun stuff - got to spray
batteries all over a test cell <g>. Made me very cautious around
charging batteries.
On Thu, 3 Mar 2005 18:03:18 UTC Rich Hampel <RhmpL33@nospam.net>
wrote:
> But you cant equalize a gel battery ... or you blow out the pressure
> valve. I simply turn them upside down and slow charge them back to
> recovery.
>
> In article <JxX2tWiP5BNp-pn2-GqEYlVzZGVkc@anon.none.net>, Will Honea
> <whonea@yahoo.com> wrote:
>
> > I have designed and built such chargers for industrial and
> > instrumentation batteries - some the size of your Jeep - and there is
> > a caveat to all these processes: success rate even in lead-acid (or
> > Gel equivilants) designed for deep discharge is at best 75% for one
> > day sitting dead. That goes down rapidly with each day it sits.
> > After 4 days, getting even one back to a functional state is a
> > surprise. Also look at the cost and what you have even if it does
> > work. Sometimes it's cheaper and a lot more reliable to bite the
> > bullet and get a new one if there is any doubt.
> >
> > On Wed, 2 Mar 2005 19:37:52 UTC Rich Hampel <RhmpL33@nospam.net>
> > wrote:
> >
> > > If you left the battery fully discharged for more than one or two days.
> > > take the battery to an auto-electric speicalty shop and have them
> > > 'equalize' it. When you ask to have it done and the counter man has a
> > > strange look on his face, leave the shop.
> > >
> > > Equalization is controlled over-charging (at a precise voltage ... and
> > > correlated to actual battery temperature) will help to desulphanate the
> > > plates, Batteries that are left in a dead state for more than one to
> > > two days will sulphanate which will lead to premature battery failure.
> > > Equalization is done by applying a specific charge rate that causes the
> > > battery to 'boil'. Obviously dont do this yourself as you may explode
> > > the battery in the process, etc.
> > >
> > > A rapid fast full charge (turn the charger switch to 'manual' ), will
> > > sometimes be good enough. Do this outside and with plenty of 'space'
> > > so if the battery 'goes' noone gets hurt. Hook up charger, switch to
> > > manual, follow looooooong extension cord to power source and plug in.
> > > Dont even think of going near the battery when its fast manual charging
> > > in case it goes booooooom. Charge for about an hour, turn off charger
> > > and if battery is less than hot to touch, switch to automatic, etc.
> > >
> > > There are three stage solid state (expensive) external regulators that
> > > allow for equalization ... but again if you dont know what you are
> > > doing, you can get seriously hurt.
> > >
> > > In article <ovednQi0hs5y1rjfRVn-sw@adelphia.com>, nds
> > > <neil.scott@adelphia.net> wrote:
> > >
> > > > The battery may survive. Suggest setting battery charger to 6 volt setting
> > > > and when charge rate drops below 2 amps set to 12 volts and continue to
> > > > charge.
> > > >
> > > > "Greg" <greglc84@hotmail.com> wrote in message
> > > > news:nBpUd.519892$8l.226545@pd7tw1no...
> > > > > I park my CJ in one of those 10'x20' grey plastic garages, was out
> > > > > wheeling last sunday, and obviously I forgot to turn off lights, battery
> > > > so
> > > > > dead not even a click, stuck camper battery in and on come lights. So
> > > > > question is, had CJ for 1 1/2 years, battery of unknown age, one of
> > > > > those
> > > > > ones with green lights, ( no green there today ), is it worth trying to
> > > > > charge it or is it shot? I've had dead batteries before, but not ones
> > > > > that
> > > > > dead, 7 days of headlights on, so I don't know if a non deap cycle battery
> > > > > can come back from that.
> > > > >
> > > > >
> > > >
> > > >
--
Will Honea