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Author Topic: 12v sealed lead acid battery  (Read 1047 times)

Detomo

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12v sealed lead acid battery
« on: November 25, 2023, 12:34:26 pm »

Hi peeps,
I have a flat 12v battery, that does not take a charge. Has anyone got any ideas how to revive it and put some life back in it.
Yours Tomo
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JimG

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Re: 12v sealed lead acid battery
« Reply #1 on: November 25, 2023, 01:15:51 pm »

If you look around you will probably find some methods on You Tube, one that some try is to start the charge with a high voltage charger for 24V  to try and shock it. WHatever method you could try however it's not really worth it, even if it takes a charge it will be low capacity and low output. If the battery won't take a normal charge it is basically dead and best disposed of and replaced.
Jim
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Andyn

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Re: 12v sealed lead acid battery
« Reply #2 on: November 25, 2023, 06:37:44 pm »

Short answer- No.


Where are you based? I may be able to assist with a cheap replacement
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grendel

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Re: 12v sealed lead acid battery
« Reply #3 on: November 26, 2023, 07:18:16 am »

on occasion I have revived lead acid batteries that have been over discharged recently back to life by just connecting them to a solar panel, the cycling of charge over a few days / weeks can sometimes get them back, but its no guarantee, if the lead acid has been discharged for a longer time its almost inevitably dead.
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Hurric123

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Re: 12v sealed lead acid battery
« Reply #4 on: November 26, 2023, 09:53:42 am »

The charger probably needs to see voltage before it will produce a charge. You will need to connect a similar voltage battery in parallel then take the second battery away once the charger has put some voltage in and the charger should then carry on charging the original one
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