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Battery charging

Discussion in 'Boats and Motors' started by DrChip, Aug 22, 2005.

  1. I just rigged up two 12v batteries (+ to +, - to -) to increase the running time for my 12v trolling motor. My question is, when I hook up my portable charger, can I just hook up to one battery and both of them will charge? Or do I have to charge both separately?

    I learned about this hookup method on this board, so I'm hoping someone can advise me on this too. Thanks!

    Chip
     
  2. Timbr

    Timbr Alaska Grayling

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    Only if both batteries are the exact same capacity and the same age. I would disconnect them. Take it from me, I fried one that way.

    Do a search on this topic.
     

  3. Thanks Timbr. Nope, one is new and higher capacity, one is older. Guess I'll do some disconnecting... ;-(