Factory price, fast delivery Multiple protection from overtime,overheat, overcurrent,short-circuit 1. capacity: 3000mAh/4000mAh/6000mAh ... output USB2: 5V/2A cycle life: 500times 2.Factory price,fast delivery3.Mutiple protection from overtime, overheat ,overcurrent, short-circuit4.Different charge connectors ... so on.7. Sample:2days Order:7-15 working days Factory top sale and lowest price power bank