12V battery isolator/switch

Discussion in 'Gen 2 Prius Main Forum' started by priumium, Dec 4, 2025 at 12:06 PM.

  1. priumium

    priumium Member

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    I finally tested to install a battery switch for the negative/ground terminal on the annoying trunk battery placement in my gen 2s.

    I wish to recommend this to everyone DIY since it makes me able to cut power over winter or when doing maintenance work without even removing one piece of the trunk pieces.

    Just by opening the right backlight cover I am now able to reach this switch and cut 12V. This might have been posted before, but I failed to find anything like this.

    I bought one version from temu first, this had the best design in my mind. I had to grind the pole down a bit, but this version has adaptable screws that easily fits the small sized poles that the Prius uses and locks them into place real good.

     
    #1 priumium, Dec 4, 2025 at 12:06 PM
    Last edited: Dec 4, 2025 at 12:25 PM
    VelvetFoot and bisco like this.
  2. PriusCamper

    PriusCamper Senior Member

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    That's a great looking design but there's no way I'll buy it from Temu. I wonder who else sells them?
     
  3. priumium

    priumium Member

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    (Why not temu? Tariffs? Sex dolls..?)

    For your information I have failed to find this much smarter design anywhere else. Contact the seller directly and ask, it seems like a very much smarter version with the screws.

    I bought four different designs from AliX and the other ones are all to big for the poles and are also hollow (bad for grinding) and without screws! Easily fixed with a drill, but I have now bought three of these instead.
     
  4. priumium

    priumium Member

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  5. Mendel Leisk

    Mendel Leisk MMX GEN III

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    There are also switches that don't directly connect to the battery posts. Depends on the application, ease of access.