Question on Prius Prime 12v Battery Config

Discussion in 'Prime Technical Discussion' started by Michael Wood, Jul 2, 2021.

  1. Michael Wood

    Michael Wood Active Member

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    Does anybody know what that apparatus is that's attached to the positive terminal on the Prime 12v battery? Pic attached.
     

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    #1 Michael Wood, Jul 2, 2021
  2. schja01

    schja01 One of very few in Chicagoland

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    The red thing is a cover/insulator the black thing looks like a fusible link. Both are safety devices.
     
    #2 schja01, Jul 2, 2021
  3. Michael Wood

    Michael Wood Active Member

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    Yes......the black thing that's under the red cover is what I was referring to - looks like a splitter of some kind. And I thought I noticed fuses in it, but I wasn't sure - thanks for the confirmation. I'm not sure if it would be advisable or even possible to use a battery tender on this battery.
     
    #3 Michael Wood, Jul 2, 2021
  4. schja01

    schja01 One of very few in Chicagoland

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    I use one regularly. The red cover opens by squeezing the two molded arrows. The negative pole is totally exposed.
     
    #4 schja01, Jul 2, 2021
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  5. Michael Wood

    Michael Wood Active Member

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    Nice......I'll give the Deltran Jr. a try. Thx.
     
    #5 Michael Wood, Jul 2, 2021
  6. sam spade 2

    sam spade 2 Senior Member

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    The "junior" is a very low capacity unit that really is intended to be used for motorcycles and lawn mowers.
    It probably will be fine for your car........as long as the battery is fresh and healthy.
    But then you don't need one at all if it is driven regularly.

    It will NOT be at all useful to recharge a battery that is mostly DEAD.......probably.
     
    #6 sam spade 2, Jul 2, 2021
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  7. ChapmanF

    ChapmanF Senior Member

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    I typically attach whatever accessory wiring I'm adding to the protected side of that fuse. It's generally a bolted connection and as easy to get to as the clamp itself, so it will take a common ring terminal and make a very convenient and protected attachment point.
     
    #7 ChapmanF, Jul 2, 2021
    Last edited: Jul 2, 2021
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  8. Michael Wood

    Michael Wood Active Member

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    I own both the Deltran BatteryTender Jr. and the Plus. Agreed......you need a healthy battery (that you'd like to keep healthy) to use the Jr. on a car battery but I prefer it to the Plus. It takes about 4 hours to flip from red to green and provides a gentle float charge that I trust.

    I only got 4 years out of my 2015 Prius 12v with no maintenance charging. Deltran advertises a 50% increase with maintenance - so that should be 6 years. We'll see.


     
    #8 Michael Wood, Jul 3, 2021
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