Will Prius Prime 12V battery die after a 25 days vacation?

Discussion in 'Prime Main Forum (2017-Current)' started by syllablelight, Aug 10, 2021.

  1. syllablelight

    syllablelight Junior Member

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    I'm a total noob at this, so apologies in advance for a silly question - does anyone have photos/videos of how to disconnect the negative terminal of the 12V battery in a 2021 prius prime?

    I've read through all the comments and it seems that disconnecting the negative end first is the safest option, and after that there is no real need to disconnect the positive end. I don't really know how to (this is my first car too).
     
  2. bisco

    bisco cookie crumbler

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    this isn't a prime, but might be similar
    watch
     
  3. PT Guy

    PT Guy Senior Member

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    A car only sits on the ship for a couple of weeks. Say the ship makes 18 knots, then the run from Japan to Los Angeles will be 12 or 13 days. A trip from Asia through Panama to the U.S. east coast will be maybe a week longer. A car can sit on a dealer's lot or showroom floor longer than that. I think the tires are over inflated to give a steadier platform for lashing the car down inside the ship. I've parked vehicles for a couple of months without problem. (Not a Prime with its battery draw.) There is no need to change the oil before the scheduled time. Oil inside a shut-off engine is very stable for a long time.
     
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  4. Trollbait

    Trollbait It's a D&D thing

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    In most cars, the battery and its negative terminal is easy to spot once the hood is opened. The terminals are metal posts on the battery; top or side. The negative has a black cable connected to it. The positive uses red, and has a little plastic cover for the terminal. The cables are held on by a clamp that is tightened by a bolt. Taking them off just means loosening that bolt until it is easy to slide the clamp off.
     
  5. Mendel Leisk

    Mendel Leisk Sand Pounder

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    Don’t ovetighten when reconnecting clamp: there’s a very light torque spec in the repair manual, but in practice a 10 mm box wrench is easiest to use. Finger-tight the the bolt, then maybe a 1/4 turn more. Definitely not full force. Check that it’s secure by trying to wiggle it; it should stay put.
     
  6. pghyndman

    pghyndman Active Member

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    Seems to be the best advice so far... removes the high drain circuits while maintaining the ECU. Thanks, Georgina!
     
  7. sam spade 2

    sam spade 2 Senior Member

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    The ultimate answer depends mostly upon:
    How OLD your 12 V battery is.
    How fully charged it is when you leave.

    Then......it would seem if you have access to plug in the main charging cord and leave it, you should be able to fairly easily arrange to plug in a tender and leave IT too.
     
  8. schja01

    schja01 One of very few in Chicagoland

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    Watch the “Ken Wins” episode of “Breaking Bad”. Maybe a little over the top but possible.
     
  9. jerrymildred

    jerrymildred Senior Member

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    Maybe possible if that windshield washer squeegee had a metal bar a couple inches thick. LOL! That little strip would have melted in two in about a tenth of a second. Definitely fun to watch, though.
     
  10. Ovation

    Ovation Junior Member

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    It’s the washer fluid. Makes all the difference. :whistle:
     
  11. jerrymildred

    jerrymildred Senior Member

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    Right!! :ROFLMAO::ROFLMAO::ROFLMAO:
     
  12. Sid786

    Sid786 Active Member

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    These days battery maintainers are small and can fit under the hood. But you will need the solar one, which will keep on running with solar. I am not sure if those tiny maintainers will last 25 days. I had gone through similar experience but parked the car for 5 months, after which battery was dead and had to tow and replace the battery. Please keep us posted once you return.
     
  13. sam spade 2

    sam spade 2 Senior Member

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    They certainly should.
    But the capacity might not be enough to do much good.
     
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