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Car battery in UPS?

Discussion in 'Misc Electronics' started by notme, Jul 25, 2009.

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  1. notme

    notme Guest

    Observing proper safety (ie, not using it inside the home), is there any
    reason using a car-sized 12v gel-cell (eg, Optima*) would be a Bad Idea (tm)?

    Form-factor is not an issue; the battery would be outboard, of course.

    Charging time would be much longer considering the modest charge current of
    the UPS, but so would be the discharge time.

    Opinions?

    Thanks.

    *<http://optimabatteries.com/optima_products/yellowtop/index.php>
     
  2. Sylvia Else

    Sylvia Else Guest

    Are you sure the available charge current will exceed the self-discharge
    of the battery?

    Sylvia.
     
  3. Nico Coesel

    Nico Coesel Guest

    You should use a sealed battery. Car batteries may leak accid and H2
    gas. Most UPS I've seen have a fuse in series with the battery. Make
    sure to retain the fuse. I'm not worried about the charge current. An
    UPS is usually fully recharged in a couple of hours.
     
  4. PeterD

    PeterD Guest


    Any deep-cycle LA battery would work.
     
  5. Should work with out a problem, except for charging.
    IF you want an indoor friendly battery look at the AGM, they don’t gas
    like LA's.

    Cheers
     
  6. Andrew

    Andrew Guest

  7. notme

    notme Guest

    That's a *great* primer on LA batteries of all types (liquid, gel, AGM,
    deep-cycle); there's not a type that's not described.

    "Myth: The old myth about not storing batteries on concrete floors is just
    that - a myth. This story has been around for 100 years, and originated back
    when battery cases were made up of wood and asphalt. The acid would leak from
    them, and form a slow-discharging circuit through the now acid-soaked and
    conductive floor."

    Thanks!
     
  8. Heres the real Battery FAQ <http://www.batteryfaq.org/>


    Cheers
     
  9. Rich Grise

    Rich Grise Guest

    You say, "Car-sized"; but you haven't said if it's a car battery or a
    deep-cycle (RV, Marine, golf cart).

    Don't use a car battery. They're good for 600 cold cranking amps, but
    crap for deep-cycle applications.

    If it is, in fact, a deep-cycle battery, then there should be no problem,
    as long as your UPS can keep it charged, as has been mentioned.

    Good Luck!
    Rich
     
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