... charging qi power charger with receiver case for iPhone 4 4s, powerqi portable battery If you're like me, ... charging system for iPhone 4/4s.2.It will charge your iPhone 4/4S efficiently by this magnetic resonance ... it more convenient.hang it on the car,charnger base and charge have magnet inside,so safe to hang ... use in day time),put the charge on the base.then leave it away.It will charge itself until ...