1

I have been working with two 12 V lead-acid batteries in series. Accidently, we kept them turned on for a day or two and one of them drained to ~3 V and the other to ~8 V.

I immediately charged them, but they get charged and drained super quickly. I read about recovery charge on this forum, but my charger doesn't seem to have a recovery charge function.

Also, sometimes it gets charged to 16 V on balance charge. Can those batteries be recovered or should I replace them?

ocrdu
  • 8,705
  • 21
  • 30
  • 42
mrbeast
  • 11
  • 3
  • 1
    Do you mean "lead acid"? They fail rapidly when heavily discharged, and most likely now need to be replaced. – Tim Williams Apr 09 '23 at 04:22
  • 1
    Lead acetate you say? Perhaps you could turn them into solar cells https://www.sciencedirect.com/science/article/abs/pii/S2211285519310948 – Bruce Abbott Apr 09 '23 at 04:48
  • Sorry for mistake I meant lead acid battery – mrbeast Apr 09 '23 at 17:05
  • Depends. If you charge them up, preferably to 16 V, let them bubble a little and refill any lost water (distilled), they may very well be serviceable. Do you have access to any ESR or load tester? – winny Apr 09 '23 at 17:11

1 Answers1

0

There was no way to recover it. That battery went dead. Used it for other minor application and bought new battery for my original application.

mrbeast
  • 11
  • 3