External Battery for Smartphone and Tablet. Compact design in credit card size, light weight and high performance! Capacity: 4400 mAh, Output: 5V/1A, Charges an iPhone 5 (1440 mhA) up to 3 times, LED indicators show the available capacity, High capacity Li-ion battery, High quality plastic housing, Perfect for travelling and on the go, Compact size - perfect for your pocket