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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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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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