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What 12V battery would you recommend? Additionally, is there anywhere else I can hookup the leads?

Discussion in 'Prime Care, Maintenance and Troubleshooting' started by Joe Wall, May 12, 2024.

  1. Joe Wall

    Joe Wall Member

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    I'm a travel nurse so I don't always have a plethora of tools and etc. I woke up and it said the 12V was dead. I never had anyone else jump this car yet. My first question is there anywhere else I can try to jump this?

    Secondly what 12V battery would you recommend if the battery is dead? I'm hoping to get one off Amazon or go to Autozone or etc to get one ASAP. It's 7 years old with 58k miles on it. I'm worried about my commute tomorrow. Any advice?
     

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  2. Mr.Vanvandenburg

    Mr.Vanvandenburg Senior Member

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    Walmart sells them. I never had them put one in, so don’t know if they charge or not for it. I usually put in myself.
     
  3. AzusaPrius

    AzusaPrius Senior Member

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    You are posting in the Gen 5 forum for cars that are 2023 and up.

    Im pretty sure those batteries are NOT 7 years old yet.

    Might be better to post in the correct forum for your model year.
     
  4. RandyPete

    RandyPete Member

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    What year and gen is your prius ?
     
  5. Joe Wall

    Joe Wall Member

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    2017 Prius Prime
     
  6. RandyPete

    RandyPete Member

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  7. RandyPete

    RandyPete Member

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    The Gen4 Prius uses a flood lead acid battery vented to the atmosphere, because its under the hood next to the engine (no need to avoid H2 gasses there. Should be a fairly inexpensice batery.
     
  8. Paul Gregory

    Paul Gregory Active Member

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    I had a 3rd Gen Prius that happened to be a plug-in, but I doubt it makes a difference. My 12V battery failed after about 5 years, so I went for a 3rd party battery from a reputable source, called NAPA. It was smaller than a regular 12V, and it cost a lot more. I had to pay over $400 for it at the time. The reason I was given is because it was AGM. I had a shop measure the parasitic drain, and they said it was about 50 mA. In retrospect, I probably didn't need to replace the battery, I just needed a battery maintainer. As it was, if I didn't drive it within about 7-10 days, I had a dead battery. After I installed the battery maintainer, I never had another problem.
     
  9. Joe Wall

    Joe Wall Member

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    Have a link for one? I'm not familiar with this.
     
  10. Hammersmith

    Hammersmith Senior Member

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    Don't worry about it. Doesn't apply to you.

    You need one of the following sizes(they're all the same size, just different names):

    LN1
    H4
    140R

    You can get one from Toyota if you wish(part number 00544-H4052-470), but you can also get one at many local autoparts stores, including Walmart or Costco.

    For example:
    https://www.walmart.com/ip/EverStart-Maxx-Lead-Acid-Automotive-Battery-Group-Size-H4-LN1-140R-12-Volt-480-CCA/1656991582
    MTP-H4 battery | Interstate Batteries
    https://www.autozone.com/batteries-starting-and-charging/battery/p/duralast-gold-battery-bci-group-size-140r-480-cca-h4-dlg/478446_0_0
    https://www.oreillyauto.com/detail/c/premium/more-powersport/batteries/battery---best-fit/7272aa5cfedd/super-start-premium-battery-group-size-140r-h4/ssbi/140rprm

    Your car came with a standard lead-acid(flooded) battery, so don't feel like you have to spend extra money for AGM batteries. Previous versions of the Prius(gen2 & gen3 - up through 2015) used AGM, but the gen4 and gen5(2016 onward) went back to standard lead acid.
     
    Jabog6 and Brian1954 like this.
  11. Gokhan

    Gokhan Senior Member

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    It makes no difference in price whether it is centrally vented or not. Moreover, most if not all sold at the EN LN1/BCI 140R/DIN H4 size are centrally vented.
     
  12. Gokhan

    Gokhan Senior Member

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    Get the Walmart EverStart Maxx BCI 140R (preferred) or DIN H4 (if BCI 140R not available). They are both equivalent sizes to EN LN1. They will work in Gen 5, too, as long as they are centrally vented. The recently introduced EverStart Maxx BCI 140R is centrally vented for sure. The newer versions of EverStart Maxx DIN H4 might be centrally vented, too.

    Walmart now carries the Prius Prime battery—EverStart MAXX 140R | PriusChat
     
  13. Paul Gregory

    Paul Gregory Active Member

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    It's not a "trickle charger," It's a battery maintainer. It monitors battery voltage, and applies a top-up charge as needed.
    NOCO - 2-Amp Smart Battery Charger - GENIUS2
     
    #13 Paul Gregory, May 12, 2024
    Last edited: May 12, 2024
  14. BiomedO1

    BiomedO1 Senior Member

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    It's a 7 year old battery and it doesn't look like the electrolyte levels has ever been topped off. In this case, a battery maintainer isn't going to help much - since the battery probably needs to be replaced.

    @Joe Wall, that jump pack in your picture should be able to get you by until you get a chance to replace that battery. The battery is nothing special so Walmart or any auto parts store should have what you need. Where you hooked up the leads, in your picture, is fine - though old school mechanics would beg to differ.....

    Good Luck...
     
  15. Paul Gregory

    Paul Gregory Active Member

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    I believe the Gen 3 uses an AGM battery, which does not have refillable flooded cells. If it has degraded to the point where it won't take a charge, it should be replaced.
     
  16. BiomedO1

    BiomedO1 Senior Member

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    It's a 2017 gen4 Prius, battery under the hood, in the engine bay. Standard flooded lead acid battery, with accessible electrolyte ports - check his pictures.
     
  17. Joe Wall

    Joe Wall Member

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    I jumped it and it worked
     
  18. Paul Gregory

    Paul Gregory Active Member

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    Just an idea here, but sulfate crystals can build up between the plates and short the battery. Sometimes, the high amperage of a boost can burn out the short, and temporarily restore the battery for a time.
     
  19. Paul Gregory

    Paul Gregory Active Member

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    It says he owns a 2009 Prius, which I believe is a Gen 3.
     
  20. BiomedO1

    BiomedO1 Senior Member

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    See post #5, Did you think he just cut and pasted some random pictures from the internet; because that definitely isn't a gen3 battery bay, in his pictures.
     
    #20 BiomedO1, May 13, 2024
    Last edited: May 13, 2024