this is portable mobile charger with high capacity which using high quality battery cell.
Its capacity reach to 3000mah. Unit adopt exclusive apple output connector and have double function of charger and backup battery.whenever and wherever, you needn’t worry about power off of device. 
      
Product Specification:
Battery Cell: Li-polymer
0utput Voltage: 5V
Output Current: 500mAh
Input Voltage: 5V
Input Current: 500mAh
Capacity: 3000mA
Charging Time: 7-8 H
Working Time: about 4 h(depend on brand, model, operation)
Size: (L)91mm*(W)63mm*(T)17.5mm 
Weight: 99g
Warrant:one year