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Car Battery Trickle Charge

Discussion in 'Misc Electronics' started by Phil, Aug 1, 2006.

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  1. Phil

    Phil Guest

    My car is sometimes laid up for long periods. Can anyone advise the
    best way to trickle charge the battery in situ to prevent the alarm and
    self-discharge from causing a flat battery?

    Are there any web sites that discuss this topic?


    Liverpool, UK
  2. Al

    Al Guest

    In days of yore, before all of the electronics junk in the car, I would
    remove the battery and charge it daily for about an hour using a
    commercial battery charger. The current draw was about 4 amps. I had it
    set on an applicance timer. Nowadays, you may kill your electronics if
    you remove the battery.

  3. Yukio YANO

    Yukio YANO Guest

    Available from $20.
    Yukio YANO
  4. Sjouke Burry

    Sjouke Burry Guest

    I had a good read a week ago in a charger manual.
    The charge protocol they advise for stored units,
    is to charge until full,then charge some more at a
    lower current,and after that to wait until self-
    discharge drops the voltage to something like
    12.2 to 12.4, after which you repeat the cycle.
    There are some chargers,which do this automatically,
    and have a temperature sensor at one of the
    poles,because the whole story about charge/discharge
    is very temp related.
    I dont remember the brand, but it is a US one(I think)
    used a lot in marine environment.
    Extended trickle charge seems to damage your plates
    somehow, and can spell disaster(ask my friend,he had
    to clean his entire boat with soda water to remove
    the evaporated sulfuric acid,at the end of the winter)
  5. Phil

    Phil Guest

    CWatters wrote:
    Good grief. The battery isn't that old. They're all "no maintenance"
    units nowadays aren't they?

  6. Phil

    Phil Guest

  7. Phil

    Phil Guest

    That looks useful, and there's lots of technical info as well.

    My thanks to all who have contributed to this thread.

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