Original factory 12V battery dead with zero warning

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by 9watts, Mar 21, 2025.

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  1. 9watts

    9watts Junior Member

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    Regarding that battery tender. Is that something I could hook up to the 12V battery in the back directly? Seems a bit easier? Or?
     
    #41 9watts, May 26, 2026 at 11:41 PM
  2. rjparker

    rjparker Tu Humilde Sirviente

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    Yes. Most of them have a simple quick disconnect to make using it easy especially if you don't drive every day.
     
    #42 rjparker, May 26, 2026 at 11:49 PM
    Last edited: May 27, 2026 at 12:01 AM
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  3. PriusV17

    PriusV17 Active Member

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    Consider hooking up a cable with SAE connector to 12v battery and then route it to behind the tail light cover for easy access to charge. While you're at it. Attach yourself an AirTag or Smart Tag 2 (Samsung) so you can track your car if lost or stolen (y) Sometimes your car might get towed way when you think it was stolen.

    sae-2.jpg

    prius-12v-charger-port.jpg
     
    #43 PriusV17, May 28, 2026 at 2:16 AM
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  4. Air_Boss

    Air_Boss Senior Member

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    IMG_8342.jpeg IMG_8343.jpeg I use CTEK battery conditioners on ‘the fleet’, with LED battery condition indicators integral to quick connects.
     
    #44 Air_Boss, May 28, 2026 at 7:47 AM
    Last edited: May 28, 2026 at 7:55 AM
  5. 9watts

    9watts Junior Member

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    This is great fun. I love gadgets, and appreciate the brand name recommendations. But I have to ask: if I manage to avoid accidentally bumping the dome lights is there any reason for all this getup? I've driven cars most of my life and never given the 12V battery much thought; certainly didn't buy it any toys. Is the Prius 12V battery more at risk/in need of pampering? I see these gadgets as helping me to avoid asking my neighbor to jump me, but otherwise I'm not so clear on the reason for this.
     
    #45 9watts, May 28, 2026 at 8:51 AM
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