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Thread: Revive a dead battery????

  1. #1
    Flashaholic Wildcat's Avatar
    Join Date
    Nov 2003
    Location
    Spring, Texas, USA
    Posts
    244

    Default Revive a dead battery????

    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

  2. #2
    Flashaholic*
    Join Date
    Oct 2003
    Location
    Two Rivers, Wisconsin
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    3,828

    Default Re: Revive a dead battery????

    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.

  3. #3
    Silver Moderator
    SilverFox's Avatar
    Join Date
    Jan 2003
    Location
    Bellingham WA
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    11,610

    Default Re: Revive a dead battery????

    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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