Original Redmi MI 20000 Mah 3.7V

Redmi MI 20000Mah Portable Charging Powerbank features: Battery Energy: 3.7V 

Dimensions: 147.8 * 73.9 * 15.3mm
Rated Capacity: 18000mAh (5.1V/2A)
Input Interface: Micro-USB
Output Interface: USB-A
Charging Time: About Four Hours (9V/2A 12V/1.5A Charger), About Six Hours (5V/2A Charger)
Packing List: One Charging Treasure, One Manual, One USB Data Cable
LED Battery Indicator
Double-Click The Current Check Button To Enter The Low Current Mode
Multiple Protections, More Secure:
Temperature Protection
Short Circuit Protection
Overvoltage Protection
Anti-Reverse Protection
Overcurrent Protection