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    Battery plate sulphation
    From: George Huxtable
    Date: 2003 Oct 12, 21:58 +0100

    A previous mailing said-
    I also added an
    >anti-sulphation chemical to the electrolyte, as prolonged trickle charging
    >can lead to sulphur coating the battery plates and reducing their life.
    This puzzles me a bit. I always thought that sulphation of the battery
    plates was a result of leaving a battery in a fully-discharged condition
    for a long time.
    I recently tried to resurrect an old battery, neglected and discharged for
    well over a year, but no current at all flowed when I connected it to a
    charger. I thought that was the result of an insulating layer of sulphate
    having formed on the plates. Was that wrong?
    I have been tempted (a temptation I have resisted, so far...) to try a bit
    of shock-treatment, by connecting it across the 240-volt mains (with a lamp
    in series). Would that be wise? Would it do any good? The battery is junk,
    But now, we're told that trickle-charging, also, can lead to sulphur
    coating. Is this the same problem I have discussed above? If so, it seems a
    bit of a surprise that the same disease can be caused by quite opposite
    mistreatments, by prolonged discharge in one case, by prolonged overcharge
    in another. I would have though that the remedy for overcharge would be a
    dose of distilled water. Does anyone know enough about batteries to clear
    the matter up?
    contact George Huxtable by email at george@huxtable.u-net.com, by phone at
    01865 820222 (from outside UK, +44 1865 820222), or by mail at 1 Sandy
    Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.

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