External Battey Case For Samsung Galaxy S3 siii i9300/portable charger

Specification

1.material:ABS +PC

2.battery capacity:3500mah

3.output rate:5v

4.output current 750~800mah

5.DC charging time:4hours

6.Chargering/sync ,simply plug in the USB turn micro USB to the micro USB female dock,connect the USB to a powered USB equipment or computer