More than 2X your battery
Specifications
Weight:  g
Capacity: 2000mAh
Cell type:Li Polymer battery 
Dimension:×× (mm)
Output voltage:5V
Output current:700 Ma max
Cycle life: 500times

Function& character:
power check& indication
power switch 
protective and powerful

Signature:
Standby Time – Up to 360 hours
Talk Time – Up to 6.5 hours on 3G | Up to 12 hours on 2G
Internet Use – Up to 6.5 hours on 3G | Up to 7 hours on Wi-Fi
Audio Playback – Up to 28 hours
Video Playback – Up to 8 hours