COOLEAD 4200mah detachable External Rechargeable Spare Backup Extended Battery Charger Pack Case Cover For iPhone 5C/5/5S (Black) -Side extra USB port can help do other emergency charging for other USB devicdes when needed;

Specification:
Battery Type:Lithium Polymer Battery
Capacity:4200mAh
Output:5V/500mA
Input:5V/500mA
Dimension: 136x62x19mm
Weight: 108g
Circle Time: Exceed 1000 Times,long service life
Charge time:5~9 hours
Charging cable:Use your original iPhone 5 charging cable(Don't include the cable )

How to use it?
1.Charge the power case:
Plug your original data cable in the charging port of the case,then connect to USB adapter or computer USB port.When charging the LEDs will be
lighten.The LEDs will blink and indicate how full it is when charging.

2.Charge iPhone:
Take off the top cover of the battery case,slide your mobile phone into it. Insert to the connector, make then connect right, press the ON/OFF
button to start or stop the charging.see the iPhone screen to identify the charging signal.

3. Show battery status
Press the power button on the back, the LEDs will be lighten immediately, show the power status
LED Indicator: 4 blue LED lights indicate 25%, 50%, 75%, and 100% of capacity

*Make sure your mobile phone is well connected to the 8 pin dock on the battery case.

Pakage
1 x 4200mAh Battery Case for iPhone 5/ 5S/ 5C
1 x User Manual