External Power Pack Backup Battery Charger Case for iPhone4 

 

Using silding design fashionale ang high-class. 

 

Charging/sync, simply plug in the USB Apple iopin date to the Apple iopin date 

Cable female dock, connect the USB to a powered USB equipment or computer. 

 

Capacity: 2300mAh 

 

Output Voltage: 5V

 

Input Voltage: 5V

 

Charging time: About 7 hours.