Still on original hybrid battery?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by saneesh8, Dec 9, 2025 at 5:43 PM.

  1. saneesh8

    saneesh8 Member

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    Location:
    Allen, TX
    Vehicle:
    2009 Prius
    Model:
    One
    My 2009 with ~157k is still on the original battery. Don't know how long it will last. Last voltage check with Autel scanner shows almost all have voltages close to each other. Forgot the exact number. Cleaned the battery fan few months back . Car is driven daily for roughly 35+ miles.

    Just want to find out who have the most mileage and oldest battery. Curious to know.
     
    #1 saneesh8, Dec 9, 2025 at 5:43 PM
  2. Tombukt2

    Tombukt2 Senior Member

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    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    My customers original.owner of car had two years ago 425K on original battery . They've never replaced or done anything with it as of 23 months ago.
     
    #2 Tombukt2, Dec 9, 2025 at 8:22 PM
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  3. priumium

    priumium Member

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    Location:
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    2012 Prius Plug-in
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    Four
    That will be veeeery hard to decipher, my own 2005 g2 passed the absurd 300.000 km ECU/ODO limit already 2017… Still has the original traction battery and it reaches green easily, unless very cold, and has good voltages and resistances.

    I haven’t found any way to determine the actual runtime of the engine. Since 2006 the g2 model could count correctly.

    If you run the car daily as you mention, it’s likely in excellent shape! It’s longer term non-usage/charging inactivity that kills any battery.
     
    #3 priumium, Dec 10, 2025 at 8:33 AM
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  4. saneesh8

    saneesh8 Member

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    Location:
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    Vehicle:
    2009 Prius
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    One
    which year ? 2009 ?
     
    #4 saneesh8, Dec 10, 2025 at 9:49 AM
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