Mbp... Not all USB ports are created equal

Discussion in 'MacBook Pro' started by mac8867, Nov 6, 2010.

  1. mac8867 macrumors 6502

    Joined:
    Apr 5, 2010
    Location:
    Saint Augustine, FL
    #1
    II discovered a very interesting anomaly with my mid-2009 13". I plugged my ipad in to syncs and charge, and the ipad said, "not charging." some research on the net yielded information that the iPad requires a higher powered USB port, which all late model macbooks have... All except mine apparently.....

    So, I tried the other USB port, and low and behold, the ipad started charging. So the question is, is this the design of the MBP, or do I perhaps have a sub-optimal USB port?
     
  2. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
  3. grahamnp macrumors 6502a

    Joined:
    Jun 4, 2008
    #3
    It's not sub optimal, the iPad requires a 10v USB port and the newer macs are equipped with one of those.
     
  4. Daku93 macrumors regular

    Joined:
    Oct 29, 2010
    #4
    Do you mean 10W? Beacause there are NO 10V USB Ports. They are all 5V. If they were 10V every device that's not an iPad would break if you connected it.
     
  5. zapro macrumors newbie

    Joined:
    Nov 21, 2010
    #5
    Wow 10 watts from an USB socket would mean hot plugs and burned connectors in the long run.

    The USB connector is rated for 2,5 Watts maximum (500 mA) - pushing 2 Amps would be asking for trouble :)

    // Per.
     

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