Features:

Brand New 100% high quality Rechargeable Lithium-ion Battery & Cover for iPhone 4/4S

Extends the battery life of your for iPhone for hours and
provides a comfortable ergonomic design with the complete protection
of a hard shell case - all in an ultra-thin,
light weight, low profile design
Up to 1900mAh capacity
LED indicator for remaining battery power
USB-micro data cable included
Unique switch design, control the charging start at any time
Capacity: 1900mAh
Input/Output Voltage: 5V
Output Current: 500mA
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
How to Use: Slot in for iPhone, Switch on button on battery pack, Close the roof cover.

Specifications:
Color: Blue
Item size: 126 x 63 x 15mm
Net weight: 126g

Packing content:
1 x Rechargeable External Battery For iPhone 4/4S
1 x Micro USB cable
1 x User Manual