Juicepack plus battery for iphones 4G 2000mAh

pecifications:

* Product Compatibility: for 4/ 4S


* Product Category: Cell Phone External Battery

* Battery Capacity: 2000 mAh

* Product Dimensions: 5.07 in x 2.51 in x 0.68 in; 2.5 oz

* Talk Time: Up to 8 hours on 3G | Up to 16 hours on 2G

* Internet Use: Up to 7 hours on 3G | Up to 11 hours on Wi-Fi

* Audio Playback: Up to 44 hours

* Video Playback: Up to 11 hours