The Lenovo PB300 Power Bank is a high-performance and quality product, with one fast-charging output for devices such as mobile phones, tablets etc. It has a large capacity of 5,000 mAh. Features: Single output USB interfaces Protective electronics design – prevents overcharging, over-discharging or short circuits. Portable design and light weight 5 V 2 A charge input 5 V 2.1 A output1. Slim design 9 mm 2. Large capacity, polymer core 3. Multiple security design 4. Four-battery indicator