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USB port vs. 12V DC power for charging iPhone 7 and Kindle

Discussion in '3rd Gen. Tacomas (2016+)' started by ChukarBob, Sep 19, 2017.

  1. Sep 19, 2017 at 7:58 AM
    #1
    ChukarBob

    ChukarBob [OP] Well-Known Member

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    Bob
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    I understand that the Qi charging pad doesn't work for iPhones. Which provides the quickest / most efficient charging for an iPhone 7 or Kindle, the USB port or one of the 12V outlets?

    Thanks.
     
  2. Sep 19, 2017 at 8:22 AM
    #2
    LivinOnEdge

    LivinOnEdge ¯\_(ツ)_/¯

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    I have a cigarette lighter adapter for my iphone that chargers very quickly. I wouldn't recommend the USB for a fast charge. If your using GPS on your phone for example while charging USB, your battery will still drain, just slower than without USB.
     
    Garyji likes this.
  3. Sep 19, 2017 at 8:39 AM
    #3
    elistan

    elistan Active Member

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    Isn't the USB port limited to 5 Watts? My understanding in that an iPhone 7 can draw up to 10 Watts while charging, so a 12 V adapter that can deliver 10 W or more will be the fastest charging method.
     
  4. Sep 19, 2017 at 8:42 AM
    #4
    Cold_Toad

    Cold_Toad Well-Known Member

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    The USB port wasn't designed for charging phones(some phones do some don't) it was for attaching a usb stick or ipod for music.

    The 12v outlet will be your best bet and 100% faster than the built in USB port
     
  5. Sep 19, 2017 at 9:06 AM
    #5
    derby

    derby Member

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  6. Sep 19, 2017 at 11:47 AM
    #6
    greg8765

    greg8765 Well-Known Member

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  7. Sep 19, 2017 at 1:18 PM
    #7
    FrayAdjacent

    FrayAdjacent Well-Known Member

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    As has been said... the USB ports built into vehicles these days are not high power charging ports. Most only support about 1A or less (that's 5W or even less), so you'll get a slow charge out of it, but that's it.

    A good 12V USB charger will do a lot better, depending on the brand and its output of course.
     

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