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Old 06-04-2010, 04:48 PM   #8
kjk
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Posts: 3,408
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Join Date: Oct 2008
Device: never enough
Quote:
Originally Posted by HarryT View Post
Presumably the reason is that it requires more power to properly charge than the USB standard permits, and Mac USB ports can supply that, whereas a "normal" USB port can't.

If I recall correctly, the USB standard permits a port to supply up to 5W of power (5V at 1Amp); the iPad charger supplies 10W.
Yes, the later model Mac USB ports are adaptable-they can supply more power if needed.
http://support.apple.com/kb/HT4049?viewlocale=en_US
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