$1100 Refurbished Battery Performing Poorly After 3 Months

Discussion in 'Gen 2 Prius Main Forum' started by PaulPrius2015, Jan 20, 2026 at 2:42 AM.

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  1. PaulPrius2015

    PaulPrius2015 Junior Member

    Joined:
    Apr 12, 2015
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    Location:
    Vancouver, Canada
    Vehicle:
    2007 Prius
    Model:
    II


    I purchased a refurbished HV battery in September, 2025 for my 2007 Prius. The battery performed well for 2 months then began charging/discharging more frequently - going down a hill frequently gets the state of charge to 70%.

    I've had the car for 10 years and fuel economy dropped slowly from 5.0l/100km to 5.4l/100km over that time. After replacing the HV battery fuel economy increased to 4.9l/100k but after 3 months it's down to 5.6l/100km.

    The vendor says they won't do anything unless I get dashboard warning light. I feel these lights are to avoid catastrophic failure - not to warn of an imbalanced battery.

    There is a one year warranty for the battery, however, I feel this warranty is useless as the battery is not likely to set off a warning light within the warranty period. The battery is bad not on the verge of completely failing.

    Do you have any recommendations?
     
    #1 PaulPrius2015, Jan 20, 2026 at 2:42 AM
  2. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
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    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    Bingo yes sir that's correct.you have to read between the lines of that nonsense .smells like poop etc . They no rebuild other batteries anywhere in my world . Till a Prius came along . Desulphating etc sure . But all this cottage industry nonsense ! I buy a real battery from a company that procured the original and produced the vehicle. They have a good chance of knowing something about it. Whereas the cottage industry well!
     
    #2 Tombukt2, Jan 20, 2026 at 6:42 AM
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