Backup Battery charger for iPhone 4 4s

We are the main Factory of External Backup battery battery charger for iPhone 4 4s. 1300mAh 1900mAh 3000mAh 5400mAh...
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100% Brand New, High quality Battery.
iPhone 4/4S external battery charging case
Full body coverage protection for your iPhone
Works as both an extended iPhone battery se and a protection case
Protective and powerful
Full Body Coverage for iPhone 4/4S
Lightweight, thin design.
Non slip comfort grip
Automatic tests function
Capacity: 1900 mAh
Output voltage: DC 5V
Output current: 500mA max
Fully charged in 3 Hours
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
Color: Black/White/Blue/Green/ Purple/Grey available
Warranty for 18 months