Yubi Power YP840A 8400mAh Portable Power Bank Backup External Battery Charger for iPhone 3/4/5 and Samsung Galaxy 2/3 (Black) High Capacity, 8400mAh, provides 4-5 charges for iPhone's 4 & 5, or 3 Chargers for the Samsung Galaxy 2 & 3 Slim, Sleek, Compact, portable and stylish Design. Convenient to carry in your pocket or purse. Perfect to stay powered while on long road trips, flights and while power off caused by stormy weather 2 USB Ports gives the ability to charge 2 devices at one time. Includes: A 1 year Warranty