20000mAh super large capacity portable power bank
Bi-directional quick charge, saves more time
High-density lithium polymer battery pack, safe and reliable 
Support charging two devices simultaneously
Built-in multiple protections
Round edges design, comfortable to hold
Battery capacity: 20000mAh (728Wh/L)
Battery type: Li-polymer Battery
Input interface: Micro USB
Output interface: Double USB
Input: DC 5V/2A, 9V/2A 
Ouput: 5.1V/3.6A