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Discussion in 'Electronic Repair' started by [email protected], Aug 15, 2009.

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  1. Guest

    Had this unit 22 months. first one was DOA. Was leary about cheap
    price. Good reason to be. Ultra won't replace it now.
    Stay away from ULTRA, Tom's didn't have anything good in their review

    Batteries measure low voltage.
    Been charging outside unit for days. Still not charged. May just be
    bad batteries, but only 22 months. OK, yes they were made in China.

    I want to know how to verify the charge voltage from the unit. Will I
    get an accurate reading measuring without the batteries connected?
    It could be that the unit isn't charging the batteries.

    Where can I find a schmatic on this unit
    UTL33044 1025VA or any of its siblings
    ....45, ...46, ...47

    If I have to replace these batteries, about $55., it is going to be
    better replacing the whole unit with a read UPS.

  2. Jamie

    Jamie Guest

    22 months is about right for cheap UPS batteries..
    you must remember that these batteries are inferior to start with!

    Many UPS'es won't even start up if the battery gets to low.

    If you have another battery of the same technology laying around, just
    connect it externally to the UPS and see if it charges. I'm sure you'll
    see it work then. I have a couple of UPS units that now use an external
    lead acid battery I picked up locally, instead of replacing the internal
    one that requires the exact fit!.
  3. PeterD

    PeterD Guest

    To be expected. Almost two years old...
    Probably good advice, but not for the right reason.
    Bing! That's the problem: buy cheap Chinese crap, and you get what you
    pay for.
    With a meter?
    It could be, but with cheap Chinese crap, it could be anything.
  4. Guest


    after charging for days via an external source set at 13.4V @ ~1A
    input, I end up with 5V on the terminals after disconnect for 24
    hours. One might say, history.

    $50 for 2x+shipping is 2/3 what I paid for the whole thing.

    unless i find a deal, i won't be replacing these.

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