Who still has the 'Original Hybrid Battery' on their Gen. 2

Discussion in 'Gen 2 Prius Main Forum' started by ski.dive, Oct 26, 2024.

  1. bisco

    bisco cookie crumbler

    Joined:
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    My neighbor has my ‘04 with about 250k now, still on the original
     
  2. MN Driver

    MN Driver New Member

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    Location:
    Minneapolis, MN
    Vehicle:
    2007 Prius
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    tl;dr - 2007 Prius 207k miles, I just completed its second rebuild, first rebuild was 2020 but no idea who did the work but it might have not been done well.

    Had a friend on the original battery of a 2008 Prius when it crashed around 90k miles in 2020 or 2021, hard to know if it would have made it to 2026 though.
    She replaced the car with a 2007 Prius, I bought it from her last year, it had a piece of masking tape dated 2020 and I assume that was the previous owner or a company fixing the pack, it failed May 2026.
    I bought a Prius junkyard pack and spent 6 days cycling and load testing the junkyard modules and 4 days doing the same for the Prius pack modules. I have experience and the right equipment to do this quickly because I've rebuilt two Honda Insight packs in the past. Only 9 of the modules in the junkyard pack were usable, the rest were total junk and dropped around 6 volts or less with only a 10 amp load in less than 1Ah. Those 9 good modules were all better capacity and lower voltage drop under load than ANY of the ones that were in my Prius pack, so those replaced the worst modules. The worst module still in the car tested at 2.9Ah under a 10 amp load, but even with only that much capacity available, Dr. Prius says "Battery pack has estimated 92.89% capacity left, it is in new condition." It has much more power now than it did before since I replaced all of modules that had the worst voltage drop(high IR) after they were cycled.

    I'll have to see how it plays out because I'm feeling the existing weak modules that I didn't replace will eventually have more go bad too, especially since a few still in the car were marginal to my standards but I've got a working car again for now and will buy another junkyard pack if things look like they are going south again versus waiting for the triangle of death and battery code next time.