Recharging HV battery after car sat for 2+ years?

Discussion in 'Generation 1 Prius Discussion' started by AlsoJakob, Nov 16, 2025 at 2:48 PM.

  1. AlsoJakob

    AlsoJakob New Member

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    I’ve got my hands on a 2001 Prius that a coworker had sitting for 2+ years after the cat was stolen. I’m trying to recharge/recondition the HV battery with a CQ3 hobby charger and so far it has been going well.

    Modules 1-22 bounced back beautifully with 5000+mAh discharges and holding steady at ~8v but 23-38 are all reading under 1v at the module. Can these be recharged/reconditioned or should I just replace them?
     
    #1 AlsoJakob, Nov 16, 2025 at 2:48 PM
  2. dolj

    dolj Senior Member

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    I think the only way is to try and see. I would charge up to 7.2 V at 325 mA, rest it for 5 - 10 mins, then do your regular charging regime.

    It will either work or it won't. You haven't lost anything trying.
     
    #2 dolj, Nov 17, 2025 at 1:12 AM
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