External battery for iPhone iPod 1800mA
Specificaion:

Capacity: 1800mAh
Cell type: Li Polymer Battery       
Input:  5V/700mA
Output: 5V/500mA
Charging time: around 3hrs
Cycle life: 500 times
Dimensions: 126*66*21 (mm)
Weight: 64g

power check and indication with button and 4 LED
safe control with power switch
protective and powerful
micro-usb charge and sync
with top cap to protect better
LED light

5 hours of talk time
36 hours of standby time
6hours of internet use
25hours of audio playback
6hours of video playback