iPhone 3G 3GS 4 External Back-up Emergency Battery

This is remarkable designed iPhone External Backup Battery for your device (Works with new models and most old models). It is especially made for traveler who may need additional power for a long trip, or just for an alternative charging source with no need for bulky wires or extension cables.

Whenever you run out of power the iPhone External Backup Battery will start using the external battery power up to 24 hours. You can check to see the power level by simply pressing the power button on the station base indicated by 4 blue lights. This can definitely extend the time for watching a movie or browsing the internet without charging the phone on the wall, be mobile!

- Capacity:  1900mAh
- Input:  5V 800mA
- Output:  5V 500mA max
- Charge time:  4 hours
- Battery type:  Lithium-ion battery
- Dimension:  67 x 62 x 15 (mm)