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Portable Power for iPhone 3G/3GS

Portable Power for iPhone 3G/3GS contains:
Integrated protective Case
USB Cable
Changeable battery

Description:
This device solves a problem many iPhone users may encounter: It can charge your internal battery whenever you want. It integrates a replacable battery and the whole kit also protects your iPhone
And it comes with a USB plug so you can charge it or share data whenever needed.

There are two parts with the Portable power kit, very easy to assemble and to use : It integrates with the iPhone 3G/3Gs as a whole,and also protects it. You can change the battery with a new one which is so convenient! The built-in cable can connect ypour iPhone with computer anytime.

The integrated battery doubles your battery lifetime.
You can enjoy up to:

Standby time:  300 hours*
Talking time:  5 hours*
MP3 play time:  25 hours*
Video time:  8 hours*
3G game:  5 hours*
WI-Fi time:  6hours*

*These are estimated figures.
Function:
3-in-1 design, protective cover, backup battery and USB data transmission functions.
Changeable Power Pack rechargeable battery.
High capacity battery increases working time between charges.
Built-in USB cable for data transmission to PC.
Fashionable design that integrates well with the iPhone3G.
Smart chip technology prevents overcharging, over discharge and short circuits.

Input Voltage	DC 5V
Output Voltage	DC 5V
Output current	700mA
Built-in Battery voltage/capacity	3.7V/1900mAh
Size	128×66×20mm
Weight	About 88g