Battery Charging Problem

Discussion in 'Motorbike Technical Discussion' started by Deruckey, May 2, 2004.

  1. Deruckey

    Deruckey Guest


    I sort of neglected my battery over the winter and now I'm having
    problems getting it going again. It was a brand new battery that I
    purchased last summer but I left it in the bike (connected) all
    winter. The bike was stored in a heated garage.

    I have a 1.2A trickle charger and I charged it for about 12hrs last
    week. Then I started the bike twice without a problem to change the

    Yesterday I wanted to go for a ride but the battery was dead :(

    It's been charging for about 20hrs right now and it's still drawing
    0.4 Amps on my ammeter! The acid is bubbling but the battery is not
    particularly hot.

    Does anyone know what could be going on here? Should I just let it
    charge and charge until its begins to draw less and less or is there
    something else I should do?

    Deruckey, May 2, 2004
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  2. Deruckey

    Bill Smith Guest

    Lead acid batteries will deteriorate if not kept fully charged. If
    your battery will not hold a charge it needs to be replaced. After you
    install a fresh battery, start your bike and check the voltage across
    the battery with a VOM. If the observed voltage goes up when you rev
    the engine. 13.5 V to 14V and change, it varies a bit, consult the
    shop manual for your bike.

    Bill Smith
    Bill Smith, May 2, 2004
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  3. Deruckey

    OH- Guest

    Short and not very helpful: That battery is fucked (more or less) and
    your charger is, by the sound of it, a rather crude car battery charger
    and will do more damage than good to motorcycle batteries if you
    don't monitor and control the process carefully.

    Good information is available on the net, e.g. on the Yuasa site.
    OH-, May 2, 2004

  4. What voltage are you reading ? At about 14 V (on the charger)
    it's fully charged. Should drop to 13 - 13.5 or so when removed
    and read about 12.5 or better when the bike's off.
    Rob Kleinschmidt, May 3, 2004
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