1.Extra power 1900mAh portable charger for iPhone 2.Multi-functional 3.Direct charge port for iphone 4.Shenzhen 5.Cheap

Specification :

capacity	1900mah
input voltage	DC 5V ±0.2
input current	700ma
output voltage	DC 5V ±0.2
output current	700ma
standby time	240 hours
recharge time	2 hours
charge methods	USB  WALL PLUG
cycle life	OVER 500 TIMES
product material	PVC+ABS
working temperature	-20°C~50°C

Extra Backup Battery Charger 1900mAh portable charger for iPhone 4/4s