Smart Battery (Optimized to lengthen your iPhone performance time; No more out of power dilemma during important phone coversations). Full Body Coverage for iPhone4. Lightweight, thin design (Low profile). Non slip comfort grip. USB charging and SYNC without the need to disconnect your iPhone4 from the case. Automatic tests function. Data transmission. 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) Sleek, Low-Profile design ; Rechargeable up to 500 times
Specification: Fully charged in 3 Hours Battery type: Lithium-ion polymer battery (Way better than Lithium-ion batteries). Output voltage: DC 5V. Output current: 1900 mh. Input: 5v 1000mA
Output: 5V. Weight: 3.2 oz. OEM. Gift Box Package, manual, iPhone4 USB Cable included.
Please make sure to charge your battery case for at least 8 Hours before first use to achieve maximum performance.
Compatible: For iPhone 4 4G