GiftU corporate gift search enginee, provides customised mobile phone accessories gift ideas, welcome small orders, professional solution, quality guaranteed 

​-  Portable external ower pack for iphone 4
- input: 5V 500mA
- Output: 5V 500mA
- Capacity: 1900mAh / 7.2Wh
- Life Cycle: 500 times
- Charging Time: 4.5 hours
- Standy Time: Up to 230 hours
- Talk Time: Up to 6 hours on 3G; Up to 12 hours on 2G
- Internet Use: Up to 5 hours on 3G; Up to 8 hours on WiFi
- Audio Play: Up to 30 hours
- Video Play: Up to 8 hours