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Checking/maintaining my 12 battery

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by NewHybridOwner, Apr 6, 2022.

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  1. CR94

    CR94 Senior Member

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    My significantly cheaper ($65) general-purpose AGM just passed 7 years in my Prius, and is still going.
     
    #21 CR94, Apr 12, 2022
  2. johnHRP

    johnHRP Active Member

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    Good for you, but statistically, we have more problems with aftermarket AGM than Yuasa (Truestart) battery.
     
    #22 johnHRP, Apr 13, 2022
  3. NewHybridOwner

    NewHybridOwner Active Member

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    I bought a new Toyota 12V battery (June 2022 manufacture date) yesterday with 10% off -- so $208.xx (plus tax). When I called, they told me the advertised "10% off parts" was supposed to be only in conjunction with work performed by the dealer, but they gave me the discount anyway. This was at Kool Toyota on the NE side of Grand Rapids.
     
    #23 NewHybridOwner, Jul 6, 2022
    ASRDogman and bisco like this.
  4. bisco

    bisco cookie crumbler

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    that's a great deal!(y)
     
    #24 bisco, Jul 6, 2022
  5. NewHybridOwner

    NewHybridOwner Active Member

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    I bought a new OEM battery with a 10% discount, then treated myself to a CTEK 4.3A charger -- a Prime Day special. I've hooked the positive lead to the terminal in the fuse box, but the only way I could find to bring the lead out of the fuse box was to have it pinched between the edges of the box and the cover. Did you find a better way to bring the positive lead out?
     
    #25 NewHybridOwner, Jul 15, 2022
  6. Mendel Leisk

    Mendel Leisk Senior Member

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    I cut off the red plastic shoulder of that positive lead; then you can bend it down much closer to the connection, get it to fit.
     
    #26 Mendel Leisk, Jul 15, 2022
  7. NewHybridOwner

    NewHybridOwner Active Member

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    Did you manage to get the wire with its connecting eyelet up alongside the thick white wire and then connect it along with that thick wire?
     
    #27 NewHybridOwner, Jul 15, 2022
  8. Mendel Leisk

    Mendel Leisk Senior Member

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    Yes.
    EFF32535-CAD3-4E90-8959-87D488D7CCD0.jpeg
     
    #28 Mendel Leisk, Jul 15, 2022
  9. NewHybridOwner

    NewHybridOwner Active Member

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    #29 NewHybridOwner, Jul 15, 2022
  10. Mendel Leisk

    Mendel Leisk Senior Member

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    Did you get the cover off that connection ok? I did it again just this afternoon and man, it never gets easier: two fussy tabs you’ve got to work on, back and forth while prying up.
     
    #30 Mendel Leisk, Jul 15, 2022
  11. NewHybridOwner

    NewHybridOwner Active Member

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    Yes, I got the cover off, but it took a little while. I hope it will be faster next time.
     
    #31 NewHybridOwner, Jul 16, 2022
  12. NewHybridOwner

    NewHybridOwner Active Member

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    Is there a 12v battery self-test mode on a 2015 Prius 4? The YouTube videos say to press the "info" button, but mine has no such button.
     
    #32 NewHybridOwner, Jul 16, 2022
  13. johnHRP

    johnHRP Active Member

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    Turn the headlight on and off slowly 3x, it will show the menu. In ACC mode it should read above 11.5 V. With headlights ON for 1 minute, if it stay above 11V under this load, it still has plenty of life. If it is below 11V, it is time to shop around. Below 10V, it is completely dead.
     
    #33 johnHRP, Jul 16, 2022
  14. Mendel Leisk

    Mendel Leisk Senior Member

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    Electronic battery testers are cool, around $50~80. I'm using a Solar BA5; it's current iteration is BA9 I think.
     
    #34 Mendel Leisk, Jul 16, 2022
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