Purple iphone 4 battery case

iPhone 4 Battery with Ultra Slim 1900mAh External Power Bank Case Black Purple $17.46

Ultra slim external battery for iPhone 4 4S
Excellent for long trips and as an emergency backup when your iPhone 4's battery drains on the go
High capacity 1900 mAh rechargeable lithium battery
Output: 5V/700 mAh max
Works with iPhone 4
LED residual battery instruction light
Sync charging your iphone and this battery is allowed
All phone ports can be reachable without moving this case
on/off switch
Comes with a usb cable

Specifications:
Standby time: Up to 230 hours
Talking time:Up to 6 hours
Audio playback:Up to 30 hours
Video Playback:Up to 8 hours
Small Size:5.02 in x 2.41 in x 0.57 in
Light weight: 60 g

Buy here:
http://www.dealmelody.com/iphone-4-battery-with-ultra-slim-1900mah-external-power-bank-case-black-purple_p6210.html