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Why is my 12v battery failing?

Discussion in 'Gen 2 Prius Main Forum' started by Skoob, Sep 29, 2016.

  1. Skoob

    Skoob Junior Member

    Joined:
    Oct 13, 2014
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    Location:
    Charlotte, nc
    Vehicle:
    2005 Prius
    Model:
    Four
    So I got this 2005 Prius with 180,000 miles on it. Once a year for the last 3 years I have had to replace the 12v battery. Looks like this will be the third time as the car is not starting again. Jump starting gets it running again.

    Beeping when I get out of car, red triangle when it first starts up then the triangle goes off. All symptoms of the battery failing.

    Has any one else seen this? Thanks.
     
    #1 Skoob, Sep 29, 2016
  2. Eastside

    Eastside Member

    Joined:
    Feb 24, 2016
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    Location:
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    Vehicle:
    2005 Prius
    Battery life might be longer by turning the Smart Key System (SKS) off. The SKS 0n/off button is below the steering wheel.

    What make battery are you using ?
    Is there anything that might be draining the battery ?
     
    #2 Eastside, Sep 29, 2016
    Mendel Leisk likes this.
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    how often to you drive it, and typically how far? there is a constant drain on the battery, and if you don't drive it much, or more than a few miles at a time, it won't charge properly. then you need a battery tender.

    if not, you might have a parasitic drain.
     
    #3 bisco, Sep 29, 2016
    Mendel Leisk likes this.
  4. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
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    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Do you have a multimeter?
     
    #4 Mendel Leisk, Sep 29, 2016
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