Power pack for Iphone4

Power pack for Iphone4 Specifictions:Model Number BTA-1700B capacity 1700mAh battery category Lithium-ion polymer rated input 5V 500 mAh rated output 5V 500 mAh weight 70g size 129*64*17(mm) Charge method:Charging method 1: Use the USB2.0 cable and the computer USB port to connect.Charging method 2: Use the USB2.0 cable and USB charger adapter output port connections, Then AC110~220V power to use?Charging for iphoneSteps(1) slot in for iphone(2) switch on button on battery pack(3) close the roof coverCautions:1 Do not throw battery into the water or make it wet;2 Do not use or store battery near heat source (like fire or heater)3 Do not throw the battery into fire or heat the battery4 Forbid to hammer to trample the battery5 Forbid disassembling the batter