Specification :

1500mah rechargeable battery case for iphone 4

Features :
1) Battery and case in one .
2) Double electricity.
3) Advanced Battery Manufacturing Technology
4) High-efficiency electronic products
5) 4 LED Display battery capacity
6) Quick charge
7) Comfortable handfeel
8) USB Port

Specification:
• Product Dimensions: 5.07 in x 2.51 in x 0.68 in; 2.5 oz
• Battery Capacity: 1500 mAh
• Estimated Shipping Weight: 1 lbs
• Product Category: Cell Phone External Battery
• Product Compatibility: For Apple iPhone 4
• Package Content Included: battery, USB-micro cable, User’ s Manual

juice pack air for iPhone 4:
• Standby Time: Up to 270 hours
• Talk Time: Up to 6 hours on 3G | Up to 12 hours on 2G
• Internet Use: Up to 5 hours on 3G | Up to 9 hours on Wi-Fi
• Audio Playback: Up to 36 hours
• Video Playback: Up to 9 hours