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Possible Duplicate:
Using an OTG cable while charging

Recent versions of Android allow USB to operate in host mode. But is it possible for them to be powered/charged via that same USB port while operating in host mode?

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marked as duplicate by ce4, roxan, Zuul, t0mm13b, Izzy Dec 1 '12 at 20:07

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

This was actually discussed on the Electrical Engineering Stack Exchange site. – eldarerathis Sep 4 '12 at 14:06
See also this answer here: Using an OTG cable while charging – ce4 Dec 1 '12 at 2:52

There is only one USB port for USB OTG (which not supports USB hubs if I remember well) AND charging the phone. So you will have to make a choice. To my mind this is the main problem with USB charging. Phones are used to having a unique port and you have to choose what you want to do with this only port.

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