For i Phone 3GS Backup battery

Mobile Power Station for iPhone 3GS,iPod & Cell phones Product features: 1. Combines a battery and case with UV coating 2. Lightweight low-profile & delicate design 3. Charge iPhone and extra battery simultaneously 4. Powerful, safe battery cell 5. Four-LED battery charge status and charge progress indicator Technique specifications: 1. Battery: Rechargeable 2200 mAh lithium battery 2. Input: DC 5V,500mA 3. Output: DC 5V,500mA 4. Standby time: Up to 398 hours 5. Talk time: Up to 6.5 hours on 3G,Up to 13.5 hours on 2G 6. Internet Use: Up to 6.5 hours on 3G,Up to 8 hours on Wi-Fi 7. Audio Play: Up to 31 hours 8. Video Play: Up to 9 hours 9. Product Dimensions:H126 × W66 × D23 mm 10.Product Weight:82g/pc Compatible with: iPhone 4,iPhone 2G,iPhone 3G,iPhone 3GS,iPod or Cellphones(LG,SAMSUNG,NOKIA,BLACKBERRY,MOTOROLA,and etc.)