Prius (2nd gen) FOB battery: is CR2025 compatible w/ CR2032

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by priusrust, Feb 23, 2026 at 1:23 PM.

  1. priusrust

    priusrust Member

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    Hello,
    Being lazy, I had the battery place pop a new battery in my FOB. Worked for a while, then did not open doors. Decided to replace shell as old is worn. Opening FOB up, I noticed it was a CR2025, and not the recommended CR2032 . I understand the size is slightly different. Could this CR2025 battery have affected operation? (FOB unable to open doors)
    Thanks!
     
    #1 priusrust, Feb 23, 2026 at 1:23 PM
  2. bisco

    bisco cookie crumbler

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    same voltage, but your not getting solid contact. didn't hurt anything
     
    #2 bisco, Feb 23, 2026 at 1:26 PM
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  3. JC91006

    JC91006 Senior Member

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    it's a thinner battery, so if the contact is not good, it would affect the operation
     
    #3 JC91006, Feb 23, 2026 at 1:26 PM
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  4. bisco

    bisco cookie crumbler

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    did the battery place charge you for their mistake?
     
    #4 bisco, Feb 23, 2026 at 1:27 PM
  5. PriusCamper

    PriusCamper Senior Member

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    Sounds like the battery they changed is thicker and forcing it in there could of damaged it and now they might have to replace it. I'd go back and talk to the manager about their policy for damaging a customers FOB. Businesses charge way more than $2 cost of battery for this "service" and now its time for them to lose money replacing the FOB they broke.
     
    #5 PriusCamper, Feb 23, 2026 at 2:16 PM
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  6. priusrust

    priusrust Member

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    I have yet to go back (blizzard today). I had a hard time getting battery out...then I saw it was a CR2025. I'll try the correct battery, hopefully it will work. At any rate, I'll let them know either way. ...2032 is marked right on the cover!
     
    #6 priusrust, Feb 23, 2026 at 2:43 PM
  7. jdenenberg

    jdenenberg EE Professor

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    Besides being thinner the CR2025 has less energy capacity than the CR2032 and will mot last as long.

    JeffD
     
    #7 jdenenberg, Feb 23, 2026 at 2:53 PM
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