12V Battery Issues?

Discussion in 'Gen 5 Prius Main Forum' started by REBobBecker, Apr 1, 2024.

?
  1. I have had 12V battery issues with 2023-24 Prime

    16 vote(s)
    43.2%
  2. I have NOT had 12V battery issues with 2023-24 Prime

    21 vote(s)
    56.8%
  1. Mendel Leisk

    Mendel Leisk MMX GEN III

    Joined:
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    You're on a phone? With an iphone I find the built-in browser works quite well for Priuschat. Well, once you install an ad blocker. With one foible, since the "fixes" last year, you have to manually refresh pretty much everything, due to buggy site, not the phone/browser.
     
  2. LLuc

    LLuc New Member

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    Sad story indeed, especially when you wait 3 hours in Canada's winter for a tow truck. New battery changed by dealer on 1 year old 2024 hybrid XLE, we'll see how long we keep this car.
     
  3. DOHCtor

    DOHCtor Active Member

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    If i can throw some defence to Toyota here, my 2012 Civic had chronic 2 years battery lifespan too. Cured those with a 51R AGM battery. Hyundai Ionics 5 and 6 seems to kill 12v batteriew fast too judging by my neighbor's Ionic 5, a friend's Ioniq 5 and my dad's Ioniq 6.. My 24 killed it's battery in 1 week and my 2025 runs on an LN0 battery as an experiment. Was parked for an entire week as i got the Civic out of storage (hit 300k miles last week), and it started right up when i staryed it up this morning to park it in the garage and plug the 12v battery maintainer on it.

    As a side note, at the dealership where i work currently, most 12v battery problems occur because salesperson don't know shiit and let them run out of juice.. once they are flat out, you can charge it back but it's going to be heavily on borrowed time allready. Those batteries (Yuasa and Panasonic LN1 cells) don't seem to tolerate being run low often..
     
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  4. VelvetFoot

    VelvetFoot Senior Member

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    The ln0 battery is smaller in dimension? Why the experiment?
     
  5. Gokhan

    Gokhan Senior Member

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    Perhaps a typo?
     
    #45 Gokhan, Apr 25, 2026 at 7:10 PM
    Last edited: Apr 25, 2026 at 7:17 PM
  6. DOHCtor

    DOHCtor Active Member

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    Not a Typo. It's a late model year Prius C battery. It's smaller, lighter, less powerful (d'uh) and it was free as it was deemed defective! Charged it and ran a desulphation run on it.. works well now.. There are LN0, LN1, LN2, LN3 and i think LN4 and LN5 too but they are rare. The higher the number, the longer they are.

    Now as for the why the experiment, well i'm trying to save weight as a way to "hopefully" save gas. It's a hair under 2$ a liter around here so every bit helps.
     
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  7. Gokhan

    Gokhan Senior Member

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    I know about LN sizes. EN LN0 through LN6 correspond to DIN H3 through H9, respectively. Uplus sells AGM batteries in LN1–LN5. LN0 is likely the least common.

    Uplus AGM battery on Amazon

    I thought it was a typo because you ignored the warning in the owner’s manual stating that any battery with less than a 45-Ah capacity would cause the car to self-destruct. :)
     
  8. VelvetFoot

    VelvetFoot Senior Member

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    And I could lose a few pounds as well...