iPhone 4 External Battery Charging Case‏

This External Power Battery Pack Air and integrated case for iPhone 4 is an ideal and powerful companion for your endeared iPhone4. It acts both as a protective case and also as an excellent external battery pack. The potent built-in 1900 mAh Lithium-ion Polymer battery can be engaged using the On/Off switch button at your will and it is able to provide additional talk time by up to 6~7 hours for your iPhone4 and stand time by 5 days. This case is stylish and portable with textured Black non-slip finish: 2 in 1 battery & Docking as well as provides full body coverage for your iPhone4.

Features:

-Smart Battery (Optimized to lengthen your iPhone performance time; No more out of power dilemma during important phone conversations)
-Full Body Coverage for iPhone4
-Lightweight, thin design (Low profile)
-Non slip comfort grip
-Automatic tests function
-High-quality Li-polymer Cell Extended battery pack - 1900 mAh
-ON/OFF Button for Optional Power Output Control
Four LED lights indicates the power level remaining the case (Each light represents 25% of remaining power