MC0225W Features Designed to work with the Samsung Galaxy S4/i9500 Can function as both an external backup battery and flip case Features 3800mAh high capacity Lightweight for ease of carrying General Specs Capacity 3800mAH Input 5V， 0.5A Output 5V， 0.8A Battery Type Li-polymer battery Charging Time 4.8 h Compatibility Samsung Galaxy S4/i9500 Package Details Weight: 151.94 g Size: 19*9.8*2.5 cm