MiLi Power iBox 8000 mAh Battery Case for iPad 2 - Silver (HI-K47) 100% Full iPad 2 Smart Cover Integration - completely compatible with your Smart Cover Licensed made for Apple Mfi plug LED power indicator - 4 LED indicators shows power level, each represents 25% of battery usage Full access to all existing functionalities of your iPad 2 Technical Specifications: input - 5V/2.1A (max), output - 5V/2.1A, capacity - 8000 mAh. Self-charging time: 5 hrs Powers up to: 10 hours of Video, 15 hours of Data, 10 hours of Music. Only 15.2 mm thick. Product measurements: 256 x 196 x 15.2mm (10.07 x 7.7 x 0.59 inches)