External Battery Charger Case for Apple iPhone 4G with 6 colors

1. Capacity: 1900mAh
2. Input: 5V 500mA
3. Output: 5V 500mA max
4. Battery type: Lithium-ion batterty
5. Built in dual protect IC
6. LED indicator for battery power level
7. 18months quality warranty
8. Package: Blister
9. Compatible with: IPhone 4G