Starter Battery dead after jump and charge

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by Jean Kinney, Feb 25, 2025.

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  1. Jean Kinney

    Jean Kinney Junior Member

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    2013 Prius Plug-in
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    AAA jumped my 2013 plug-in hybrid Sunday (I had left dome light on). I couldn’t leave then, so I left it running for two hours during a meeting, as instructed by AAA, then drove to store, parked, drove home with no problem.
    Today I had to use mechanical key to open door, but couldn’t start the car even with fob on power button. I confirmed I had not left any lights etc on. Dome light very dim when I tried it, so there’s some battery left but not much. This battery is about 3 years old.
    Now what?
     
    #1 Jean Kinney, Feb 25, 2025
  2. Brian1954

    Brian1954 Senior Member

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    Two hours of charging of the battery is not enough time.

    The first thing I would do is use a meter to measure the voltage of the 12v aux battery.

    The second thing i would do is connect a 5 amp or less smart charger and charge the 12v battery for a minimum of 8 to 12 hours.
     
    #2 Brian1954, Feb 26, 2025
    bisco and MAX2 like this.
  3. bisco

    bisco cookie crumbler

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    Needs a charger, or about 8 hours of run time.
    But even a 3 year old battery can fail if fully discharged.
    If that’s the case, there might be some warranty
     
    #3 bisco, Feb 27, 2025
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