* Compatible device: IPHONE 4 & 4S
* Input:5V 500mAh
* Do not arbitrarily dismantled battery,puncture or incinerate in a dry place
* The sleek power pack snaps inconspicusly onto the back of your phone,adding only a few millimeters of thickness, but more than doubling the battery runtime.
* It prioritizes consumption,pulling power from the power pack first,maximizing the phone's internal battery.
* You can use the our External Battery to make your phone battery life last longer.