Features:
Designed to provide power for your iPhone 4G.
Compact and lightweight, you can use your iPhone as usual as you use this external battery.
Built-in 1900mAh high capacity rechargeable Li-Ion battery.
Can also work as a protective case.
Modern coffee black color, decent design.
4 LED power indicator.
Battery itself charged through USB port or USB charging adapter.

Specifications:
Battery type: Lithium-ion battery
Capacity: 1900mAh
Input: 5V 1A
Output: 5V 500mA
Standby time: Up to 230 hours
Talk time: Up to 6 hours
Internet use: Up to 5.5 hours; Up to 8 hours on Wi-Fi
Audio play: Up to 30 hours
Video play: Up to 8 hours
Color: Coffee Black
Item dimensions: 125*65*18mm
Item weight: 59g
Package dimensions: 170*98*25mm
Package weight: 124g

Package Includes:
1 * External Battery for iPhone 4G
1 * USB Cable
1 * User Manual