Forum Discussion

kearlms's avatar
kearlms
Explorer
Nov 14, 2014

Another Battery Question

I have two 6-volt batteries for my TT and sense it is winter I have them in the shop. I have hooked them up to my battery tender in series to get the 12 volts. When I connect the tender up to the batteries the one that has the positive connection starts to boil almost immediately. Is this normal or is there an issue? I haven't noticed any boiling from the second battery, that the negative side of the tender, is connected to.
  • 2oldman's avatar
    2oldman
    Explorer II
    Nov 14, 2014
    If the batteries are sitting at about 6.4V, you really don't need them on a constant charge.

    But something does sound wrong with one of them.
  • Dakota98's avatar
    Dakota98
    Explorer
    Nov 14, 2014
    2oldman wrote:
    Sounds like it's time for a hydrometer.


    X 2 And the "Tender" is boiling the battery ? :h
  • All_I_could_aff's avatar
    All_I_could_aff
    Explorer
    Nov 14, 2014
    I have never used a tender on two 6 V in the manner you are but out of curiosity I would try switching the two batteries and see if they other one boils in the same situation with the positive on it and the negative on the other one

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