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iPhone 4S - Charging

G

Grateful Vol

macrumors newbie
Original poster
So, just got my new iPhone and docked it in an old speaker dock at the office that previously did not charge on my 3GS. To my surprise I did not get the error that charging was not supported and the phone seemed to charge just fine. Was this common with the iPhone 4 also? I am assuming the speaker dock I have uses firewire charging and I thought all new apple products were USB only.

Any input?
 
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