wholesales 1900mAh cheap Backup battery Charger power case for iphone 4 4s

Features:

External battery charger case for i Phone 4 4S 4G.
One switch on/off button for easy operation.
Sealed design and very convenient to use.
Non-slip and comfortable grip design.
One LED charge status indicator light.
Full body coverage protection for your i Phone 4 4S 4G.
Works as both an extended i Phone battery set and a protection case.
Used for charging your iPhone 4 anytime and anywhere.
Suitable For: i Phone 4 4S 4G

Specification:

Capacity: 1900mAh
Cell type: Li polymer battery Lithium-ion
Input: DC 5V. 0.5Ah
Output :DC 5V. 0.5Ah
Standby time: up to 230 hours.
Talk Time: Up to 5 hours
Internet Use: Up to 5.5 hours on 3G
Size: 12.5(L)*6.3(D)*1.6(T)cm.
Net Weight:66.5g
Color:Black

Package Includes: 

1 x External Battery Case(Black) for i Phone 4 4S 4G
1 x USB Cable
1 x English User Manual
Note:the iPhone is not included.