Stop iPhone From Charging

Discussion in 'MacBook Air' started by Westyfield2, Nov 29, 2011.

  1. macrumors 6502a

    Joined:
    Jun 9, 2009
    Location:
    Bath, UK.
    #1
    So for the first time ever I've plugged my iPhone into my MacBook Air today to use iTether. Despite my MacBook Air running on battery I notice that my iPhone believes it is getting charged. This is going to drain my MacBook Air's battery :(. I haven't plugged my iPhone in to be charged, I've plugged it in for data.

    Is there anyway I can stop this? All I want the USB connection to be doing is transmitting data to/from my iPhone. I want to turn off the 500mA of power that the USB port has, make it unpowered if you see what I mean.

    Any ideas?
     
  2. Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #2
    No, that's how most if not all cell phones work. Plug them into a USB port and they'll draw power to charge the battery.
     
  3. thread starter macrumors 6502a

    Joined:
    Jun 9, 2009
    Location:
    Bath, UK.
    #3
    I know that's how USB works :).

    What I'd like to do is tell my MacBook Air "You're running on battery FFS. Don't waste your battery charging the iPhone. Disconnect the +5V pin of your USB port when running on battery."
     
  4. macrumors 68030

    ericrwalker

    Joined:
    Oct 8, 2008
    Location:
    Albany, NY
    #4
    I am sure you can get a "special" usb cord that doesn't have the +5V Pin Or have one made (ruined).

     

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