You may run out of juice by the end of the day, but this power bank will make sure your phone doesn't.
Use with your phone’s charging cable. 2500 mAh. 10 hours of power. Includes micro-USB adaptor. Input: 5V/1A. Output: 5V/1A. Battery: 3.7V/2500mAh/Li-polymer.
Dimensions 2.50" w x 3.50" h x 0.25" d
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Portable Power Bank