1900mAh Rechargeable Portable External Battery for iPhone 4

This 1900mAh Rechargeable Portable External Battery is specially designed to charge Apple iPhone 4G that can power your iPhone at anytime. Its perfectly design can protect your iPhone and it can transfer data and charge iPhone at the same time. The operation is very simple. Just plug your iPhone into the external battery, then you can operate your iPhone as usual. What's more, you can sync your iPhone to iTunes without removing it from the external battery.
With this external for iPhone 4G, no matter where you are and when it is, you can easily charge your iPhone 4G. It's portable due to its compact size and light weight. And you will love the convenience of being able to charge your iPhone any time you want, anywhere you go. Plus, it can enhance the signal of iPhone 4G. It can be used as a emergency charger, a backup battery and a signal enhancer at the same time.
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Features:
* Enhance iPhone 4 signal
* Power switch
* Power check/indication
* Protective and powerful
* Output Voltage: 5V
* Output Current: 500mAh
* Cycle Life: 500 times
* Cell Type: Li-polymer battery Lithium-ion
* Standby Time: Up to 230 hours
* Talk Time: Up to 6 hours
* Internet Use: Up to 5.5 hours on 3G
                Up to 8 hours on Wi-Fi
* Audio Playback: Up to 30 hours
* Video Playback: Up to 8 hours
* Capacity: 1900mAh
* Dimension: 125mm*63mm*17.5mm

Package Contents:
1 x 1900mAh Rechargeable Portable External Battery for iPhone 4
1 x USB Cable