How do you know the 12v battery is OEM?

Discussion in 'Prius c Care, Maintenance and Troubleshooting' started by MICHAEL RUBY, May 22, 2023.

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  1. MICHAEL RUBY

    MICHAEL RUBY Junior Member

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    I've been having trouble with my 12v battery. The used card dealer I bought it from says they installed a new battery shortly before I bought it. But it has trouble holding a charge. So I opened up the cover under the rear seat to look at it. It is pure white, no markings of any kind on the sides of the battery. I can't see the top. It seems to fit nicely into the space for it. Is there anyway to know if it an OEM battery?
     
    #1 MICHAEL RUBY, May 22, 2023
  2. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    Well, it's easy with a 2018 c model, the way to know it is OEM is because you actually have one.

    Nobody else is supplying them at this time.

    (Ours looks the same)
     
    #2 Leadfoot J. McCoalroller, May 22, 2023
  3. bisco

    bisco cookie crumbler

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    it should say yuasa, but that would be on top. have your battery tested to make sure the battery is the problem and not the car.
     
    #3 bisco, May 22, 2023
  4. sam spade 2

    sam spade 2 Senior Member

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    There is no good reason to CARE.
    Either it is "good" or not. Who made it isn't really that important.

    Charge it manually and have it tested.
    And while you are at it, check the connections at BOTH ends of the main cables
    and then check the charging voltage when running.
     
    #4 sam spade 2, May 23, 2023
  5. sam spade 2

    sam spade 2 Senior Member

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    That is an ASSumption that may or may NOT be true.
    Have you surveyed ALL of the battery sellers in the whole world in the
    last couple of weeks ??
    If not, you do not KNOW that for sure.

    And other battery "models" that are not exactly the same may
    work just fine too.
     
    #5 sam spade 2, May 23, 2023
  6. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    The fact is I actually have been looking into a replacement 12v battery for our car over the past few weeks. So far Toyota is the only one showing availability.

    If you know about another supplier, speak up!

    I'm certain I could adapt some other battery to work and more or less fit, but I want one that fits and hooks up without a struggle.
     
    #6 Leadfoot J. McCoalroller, May 23, 2023
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  7. sam spade 2

    sam spade 2 Senior Member

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    Are you searching by year and model of CAR.......
    or searching for a replacement for the battery part number.......
    or both ??

    But yes if you insist on an "exact fit", Toyota might be the only one
    stocking that.
     
    #7 sam spade 2, May 23, 2023
  8. bisco

    bisco cookie crumbler

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    most people insist on an exact fit, especially with the c, where it is a little more difficult to access
     
    #8 bisco, May 23, 2023
  9. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    I've searched it by exact application in many battery manufacturer application guides. Most of them have zero results; some don't even let you choose a Prius c once you specify 2018 or later.

    I've searched it by the battery industry's size designation "LN0" (that's a zero) and also by the two part numbers Toyota has used- one superseded the other:

    28800-21211
    28800-21181

    I confirmed that for 2018 and 2019 they used this new LN0 size, and it's much harder to find than the S34B20R used in the 2012-2017 c.

    Local dealer says he can order it with unknown lead time, $175 plus core.
     
    #9 Leadfoot J. McCoalroller, May 23, 2023
    Last edited: May 23, 2023
  10. bisco

    bisco cookie crumbler

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    typical story of the prius battery, been a pain for 20+ years
     
    #10 bisco, May 23, 2023
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