Hybrid battery - how bout just changing bad cells without "reconditioning"?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Andrew Vanis, Jul 22, 2025 at 12:12 AM.

  1. Andrew Vanis

    Andrew Vanis Junior Member

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    Hybrid battery - how bout just changing bad cells without "reconditioning"?

    I have 2 batteries. one bad cell #7 one bad cell #13 per Dr Prius.

    Cold I just take a good cell #7 from the one with bad cell #13 and put the not-bad #7 into the one with bad cell #7?

    Ideally I would do a complete "reconditioning" like the instructions listed here - DIY hybrid battery reconditioning - where/how to start | PriusChat

    and really since I don't have a battery charger and just want to move the car now, how bout just changing bad cells without "reconditioning"?

    Thanks
     
  2. JC91006

    JC91006 Senior Member

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    You're better off buying a complete used battery and replace the one you have. The way you're thinking about doing it, it won't last long and with all the work involved in doing it, it might just be worthwhile to do it correctly the first time or don't do it at all. It'll be a waste of time and the problem will come back again real soon
     
  3. T1 Terry

    T1 Terry Active Member

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    The major problem is the stuck pressure release valves in each module pushing the electrolyte out through the terminal seals. The electrolyte needs to be topped up, the pressure valves feed and the module links cleaned and voltage sense wire harness replaced .... along with checking the pin stick out in the battery computer module ..... all in this post here https://priuschat.com/posts/3551878/ How to top up the electrolyte, the mix ration and how to release the pressure valves is in a thread about rehydrating battery modules Re-hydrating the battery modules. | PriusChat

    T1 Terry