Notice:Please make sure to charge your battery case for at least 8 Hours before first use to achieve maximum performance

Description:
Smart Battery (Optimized to lengthen your iPhone performance time; No more out of power dilemma during important phone coversations)
Lightweight, thin design (Low profile)
Non slip comfort grip
USB charging and SYNC without the need to disconnect your iPhone 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)
Rechargeable up to 1000 times - Charges through USB to micro USB 5-pin cable

Specification:
Fully charged in 3 Hours
Battery type: Lithium-ion polymer battery (Way better than Lithium-ion batteries).
Output voltage: DC 5V
Output current:  1900mah
Input: 5v 500mA
Output: 5V
Weight: 126g

Compatible:
iPhone 4 4G

package includes:
1xUSB to micro USB Cable.
1xExternal battery