Revive a dead battery????

Wildcat

Enlightened
Joined
Nov 4, 2003
Messages
281
Location
Kingwood, Texas, USA
I have a 12v motorcycle battery that is about one year old and is dead. After 10 hours on slow charge, DMM read 2.6v. Is there any tricks to bring it back to life?

Thanks
 

jayflash

Flashlight Enthusiast
Joined
Oct 4, 2003
Messages
3,909
Location
Two Rivers, Wisconsin
You could try goosing it with a ten amp charger for 15-30 minutes. Make sure it's in a safe place if it vents. If the charge meter indicates maximum charge for more than 15 minutes, the battery is shorted. I'm guessing your battery is shot, although you might double check the charger, too. MC batteries aren't as reliable as car batteries.
 

SilverFox

Flashaholic
Joined
Jan 19, 2003
Messages
12,449
Location
Bellingham WA
Hello Wildcat,

It sounds like you have problems with several cells. I am not sure if anything will work.

We used to revive weak batteries (8-10 volts) by putting 1/2 teaspoon of Epsom salt in each cell, then charging overnight. This method seems to dissolve some contamination on the plates, but only works for about one year. After that, the battery is completely dead.

Tom
 
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