Double the battery life of your iPhone 4 and 4S without sacrificing portability! The ChargeIt! 2X for iPhone 4/4S is the innovative rechargeable battery pack that"s also a stylish and protective case to guard your iPhone from mishaps. And with the included cable, you can charge and sync your phone without having to remove the case! The ChargeIt! 2X features:1900 mAh Charging Power, Stylish Protection, Ultra-thin Lightweight Design, Integrated LED Power Status Indicator, redirects Audio to Front of Case for Superior Sound, Includes Charging and Syncing Cable, has 300 hrs of Standby Time and 7 hrs of talk time, 7 hrs of 3G internet time, 10 hrs of Wi-Fi use, 10 hrs of video time and 40 hrs of music time. It includes a Li-ion Polymer Battery with 1900 mAh capacity, Output Voltage: 5V, Output Current: 500mA, Input Voltage: 5V, Input Current: 500mA and weighs 2.7 Ounces. Size: 125mm x 62mm x 18mm