Duracell Powermat GoPower Overnighter Backup Battery, Power Bank for iPhone 5S/5C/5, Samsung Galaxy S4, Other Smartphones and Tablets Slim but Powerful: Up to 2 extra charges for your phone and can also power your tablet; A very sleek but powerful portable battery; Whether you are going on a business trip or a weekend away, we've got you covered; 4400 mAh capacity; With high-output USB charging, the Overnighter can quickly charge virtually any USB device, including smartphones and tablets Quick and convenient; Charge your smartphone, tablet or USB device on the go at a rate comparable to being plugged into an outlet For ultimate convenience, recharge the portable battery wirelessly on any Duracell Powermat wireless charging surface or PMA compatible surface; What's in the box: GoPower Overnighter, USB to micro USB cable, user guide