1, 1900 mAh External Battery Case 2, CE,FCC,RoHS 3, OEM service available. 4, Protect iPhone 5, One Year Warranty 1900mAh Mobile External Battery Case For iPhone 4 Specifications:Weight: 65gCapacity: 1900 mAhCell type: Li polymer battery Lithium-ionDimension: 12.5*63*16(mm)Output Voltage: 5VOutput Current: 500 mACycle life: 500 timesFunction & Character:Enhance iPhone4 SignalPower check & ...