2600mAh Portable External Power Bank Battery Charger For iPhone4S 4 3GS Samsung i9500 i9300 HTC Blackberry Capacity: 2600mAh Input: 5V-600mA Output: 5V-800mA(MAX) Dimension: 94*22*21mm Compatible with: iPhone4 4S iPod HTC blackberry Note: Some devices need its own cable for charging, the attach cable only for charging the back up battery.