12v Battery Age?

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by kevinprius416, Nov 19, 2025 at 10:37 PM.

  1. kevinprius416

    kevinprius416 New Member

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    I picked up a 2015 Prius V the past summer with 130k km (80k miles) which had all service done at a Toyota Dealer. I decided to check on the 12v battery to figure out the age and if I should replace it now that winter has rolled in. I believe the original 12v battery is in the car, 311014 is the code if I'm not mistaken. There is also a 2434 stamp on the casing which could be a 2024 battery?

    Car has had no issues starting or exhibiting any weird electrical issues/inconsistent codes. I do fully intend on replacing the battery if the date code is indeed 2014.

    priusv-battery-date.jpg
     
    #1 kevinprius416, Nov 19, 2025 at 10:37 PM
  2. rjparker

    rjparker Tu Humilde Sirviente

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    Looks pretty new. Can't be a 2014 - they don't last that long.

    The definitive test is an old school load test, usually free at an auto supply.
     
    #2 rjparker, Nov 19, 2025 at 11:43 PM
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  3. Mendel Leisk

    Mendel Leisk MMX GEN III

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    I’d load test it (with one of the electronic load testers), go from there.

    last battery I put in our 2010 was September 2015, still testing like new. I’m using a Solar BA5 (latest iteration Solar BA9).

    note, the pictured battery is an Optima Yellow-Top, with 450 CCA spec, and maybe 38 Amp Hours. Not really optimal for Prius; when I replace it I’ll go with something with specs closer to original, say 325 CCA, and higher Amp Hours.
     

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    #3 Mendel Leisk, Nov 20, 2025 at 8:04 AM
    Last edited: Nov 20, 2025 at 8:41 AM
  4. VelvetFoot

    VelvetFoot Active Member

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    While I've never used the old school tester, I have a digital tester and based on my experience, wouldn't trust that too much. It's easy and cheap, but I'm not sure how accurate. Which type do the auto supply places use? I suppose it varies.
     
    #4 VelvetFoot, Nov 20, 2025 at 8:57 AM
  5. BiomedO1

    BiomedO1 Senior Member

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    If that car was always dealer serviced; you should be able to pull up the history through it's VIN.
     
    #5 BiomedO1, Nov 20, 2025 at 9:42 AM
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