How many amps or watts does an iPhone draw on a 12v charger?

Discussion in 'iPhone' started by mrsir2009, Jul 25, 2012.

  1. mrsir2009 macrumors 604

    mrsir2009

    Joined:
    Sep 17, 2009
    Location:
    Melbourne, Australia
    #1
    Hey, does anyone know how many amps or watts an iPhone draws while charging on a 12 volt charger?

    Thanks :)
     
  2. wharzhee macrumors 6502

    Joined:
    Apr 27, 2010
    Location:
    texas
    #2
    sorry, but er. 12v charger?

    anyway, an iphone charges at abt ~5V at ~1A, so that's about ~5W

    i don't know if u r trying to put a direct 12V, but that 12V must be step down to its intake specification of about ~5V.
     
  3. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #3
    The iPhone can draw a maximum of 1.25 amps at five volts. This is about 7(?) watts. My electrical conversion is a bit rusty. It depends on your charger. Some output only 1 amp, others 0.5 amps.
     
  4. mrsir2009 thread starter macrumors 604

    mrsir2009

    Joined:
    Sep 17, 2009
    Location:
    Melbourne, Australia
    #4
    Yep - It's a modified car charger :)
     

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