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You can get USB-OTG cables that split off so you can plug in a charger, but I think (not sure) that it's not universally supported to use USB-OTG and charge at

by gh02t 9y ago

You can get USB-OTG cables that split off so you can plug in a charger, but I think (not sure) that it's not universally supported to use USB-OTG and charge at the same time.