Smart Portable Multi-function Double USB Power Bank With Cable For Smart Device

Smart Portable Multi-function Dual USB Power Bank With Cable For Smart Device Specifications: Cell Brand Import original and full capacity grade A Li-polymer battery Advantages 1. Long working time. 2. Capacity to maintained more than83%- 85% 3. Special OEM design. Capacity 4000mAh The PCB for power bank 1) Overcharge protections 2) Over discharge protections 3) Short-circuit protections 4) Stable voltage protections. 5) Automatically identify the phone current protections.