High Capacity 4500 mAh External Battery Pack Portable Power Bank Case Charger For Samsung Galaxy S4 AT&T Sprint, Verizon, T-Mobile (Black) Fit for Samsung Galaxy S4 Capacity: 4500mAh; Charging time: about 3.5 hour Input Voltage: 5V, Input Current: 750mAh; Output Voltage: 5V, Output Current: 750mAh Durable PU Case and hard plastic construction protects your Galaxy S IV against bumps and scratches. Soft plastic and felt cover protects screen from smudges, scratches and dirt