Battery, BoxWave [Universal Rejuva PowerPack Pro] Emergency Battery w/ 2 Built In Cables for Smartphones and Tablets - Black 4400mAh battery capacity with backlit digital power display Capable of charging a smartphone and tablet simultaneously Hold button to power on/off, tap to toggle display backlit display Ultra-portable design can go anywhere you do Built in USB (input) and Micro USB (output) cables as well as high output USB port