Portable Power Case For Iphone 4G Specification Cell Type: Li-ion polymer battery Output voltage: 5VOutput current: 500mahInput voltage: 5VInput current: 500mahBattery capacity: 1900mahProduct weight: 65gProduct size: 125 X 62 X18mm Feature Integrated 4 LED Charge Status IndicatorSmart Li-ion Polymer batteryLight Weight. Thinner DesignNon-slip. Comfortable GripUse Micro Charger and SYnc Package Blister and box packing