Aptus 4200mAh Battery Case with Built-in AC Charger for iPhone 5 and 5S Battery Capacity 4200 mAh Recharge battery with built-in AC plug (90V - 265V) or iPhone Lightning Cable Charge iPhone and Case battery simultaneously Power Station - charge other devices using built-in USB port Dimensions: 5.2 X 2.66 x 0.73 inch; 3.2 Oz