What is the best way to restore a lead acid battery?

gordonmx 13 days ago

What is the best way to restore a lead acid battery? The battery is a small 4V battery out of a flashlight.

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JWx 13 days ago +3

in the times of old, when car lead batteries were scarce in my country, people were using pulsed charging, where battery is subsequently charged and discharged, which could help do dissolve sulfuric sediments…
michaelkellett 11 days ago +3

https://www.youtube.com/watch?v=kNGg0P7B5fI MK
davebullockmbe 13 days ago +2

I would suggest replacing it with a LiPo battery unless it's a 'vintage' flashlight that has to look original. I am doing a similar exercise with a vintage lead acid glass accumulator using a LiPo single…

0 JWx 13 days ago

in the times of old, when car lead batteries were scarce in my country, people were using pulsed charging, where battery is subsequently charged and discharged, which could help do dissolve sulfuric sediments - but there are cases when it is not enough...

Lead battery regenerator using 555

There are even more elaborate methods - with replacing electrolyte with something that dissolves sediments then filling with fresh electrolyte but in such a case maybe replacement battery would be simpler and cheaper?
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0 davebullockmbe 13 days ago

I would suggest replacing it with a LiPo battery unless it's a 'vintage' flashlight that has to look original. I am doing a similar exercise with a vintage lead acid glass accumulator using a LiPo single cell and a 'buck/boost' converter. Many modern LED flashlights seem to use the same method?
Just a thought...maybe a photograph of the battery may help other contributors....

Dave
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0 JWx 12 days ago in reply to JWx

and adding water if some cells become dry
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0 gordonmx 12 days ago in reply to JWx

Thank you. I'll give the 555 circuit a try.
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0 JWx 12 days ago in reply to gordonmx

I have got partial success using this method but it may depend on the battery's state
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0 dougw 12 days ago

https://www.youtube.com/watch?v=d4eZeX-v_fQ
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0 gordonmx 12 days ago in reply to dougw

Thanks, I'll given it a try if I can find the battery solution. Where did you find some?
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0 Arnovsharma 12 days ago in reply to gordonmx

You can just use distilled water + table salt solution in place of battery solution
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0 michaelkellett 11 days ago

https://www.youtube.com/watch?v=kNGg0P7B5fI

MK
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0 dougw 11 days ago in reply to michaelkellett

Kind of impressive, but not my dream job ....
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