quick battery charging question

Discussion in 'General Electronics Chat' started by thetank, Jun 20, 2007.

  1. thetank

    Thread Starter Member

    Feb 13, 2007
    14
    0
    so i have A Long sealed Lead-Calcium 12V 4Ah battery(specificly Long model: WP4-12). i know absolutly NOTHING when it comes to charging batterys. can i charge the battery with a car battery charger? if so, should it be set on 2A or 10A(i imagin 50A is way too much)? can i hook up the battery to my car via jumper cables and charge it that way? and can i check it with a multimeter to verify its done charging?


    in the near future the battery is going to power a 100w inverter to charge my laptop when i can't find a power outlet or in my car. in the distant future its going to power the onboard electronics for a wifi RC car, but thats another thread ;)
     
  2. Gadget

    Distinguished Member

    Jan 10, 2006
    613
    0
    Lead Calcium.... Sorry, don't know that one. I would have thought being sealed 12v 4ah it might be a SLA (or sealed Lead acid battery) which are normally charged with a regulated voltage of around 13.5 volts.
     
  3. thetank

    Thread Starter Member

    Feb 13, 2007
    14
    0
    yeah its getting to be a pain to find info in this battery, lol. i found that 14.8v seems what it would like to be charged at, but i still don't know about the current. should it equal to or exceeded the 4Ah rating of the battery?
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
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    Each battery type can accept some maximum rate of charge that depends on chemistry. Lead-calcium is absolutely new to me. Is there a manufacturer's name attached to the battery? If so, they probably have a spec sheet on it that gives charging information.
     
  5. niftydog

    Active Member

    Jun 13, 2007
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  6. Tube Tech

    Active Member

    Jan 11, 2007
    46
    0
    In general terms; ( I, too, know nothing about lead calcium batteries - do you add milk? )

    Batteries create electricity through a chemical proces;

    Charging a battery is a reversal of this chemical process;

    High current causes high temperatures;

    High temperatures cause changes in chemical processes. Irreversible changes, like cookie dough before and after the oven...

    So, as a rule, I charge batteries slowly. 2A for a motorcycle battery, 4A for a garden tractor, 6A for the Mustang, up to 10A for the Bronco or motorhome.

    I'm guessing that would be the safe philosophy.
     
  7. subtech

    Senior Member

    Nov 21, 2006
    123
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  8. hgmjr

    Moderator

    Jan 28, 2005
    9,030
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