... 4.Full capacity battery 5.A Grade Cell For iphone 4s/ ipad/ mobile phone, Dual USB Ports external Power Battery Pack SpecificationsCell type : ... /discharge over 1000times. It's really a multi-function battery bank for Pad/Phone, Samsung P1000 and cell phone, MP3, ... at least 6months per time.Strict Factory Quality Control: for iphone 4s/ ipad/ mobile phone, Dual USB Ports external Power Battery Pack