Xiaomi ZMI Aura Power Bank QB821 20000mAh Power Digital Display QC3.0

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BDT 2,400.0


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20000mAh ZMI Power Bank


Product name 20000mAh ZMI Power Bank
Model number   QB821   
Battery capacity 20000mAh 3.7V (74Wh)
Battery type Li-polymer Battery
Input interface Micro USB
Output interface Double USB
Input     DC 5V/2A, 9V/2A 
Ouput 2 x DC 5.1V/3.6A, 5.1V/2.4A 9V/2.0A, 12V/1.5A, MAX 18W
Weight 366g
Color White   
Low power output Yes
Size 149.3 x 70 x 25 mm
Package include: 1 x Power Bank, 1 x USB Cable, 1 x Chinese User Manual

High-density battery cells
Dual USB ports with fast charging support

Digital display - Display remaining battery




5.1V/3.6A Dual USB output

Intelligently adjusts power output, compatible with a wide range of devices
Enter a whole new level of high-speed of charging with dual USB ports with up to 5.1V/3.6A
output. Not only is the output level based on the connected device. It is compatible with
Smartphones and tablets, as well as a variety of digital cameras and handheld gaming devices.




Charging in the fast lane
Rapid charging with 44% speed increase

The new control chip in each 20000mAh ZMI Power Bank supports rapid charging.
Compatible with 5V/2A, 9V/2A and 12V/1.5A charging. the power bank takes just 3 hours to charge
11000mAh and 7 hours to charge fully - that's 44% faster than two 10000mAh Mi Power Banks
combined. It maximises time on-the-go so you spend less downtime on charging.




Massive 20000mAh capacity
The perfect carry-on for flights

Keep phones, tablets, cameras and electronic devices powered on travels with the massive 20000mAh ZMI Power bank.
Charge two devices at once with dual USB ports.




Environmentally friendly housing
Anti-slip and scratch resistant properties

The 20000mAh ZMI Power Bank isn't just beautiful. It is housed in an environmentally friendly
PC+ABS plastic that is designed for better comfort.The plastic uses an anti-slip pattern for
a better grip and is scratch resistant.
Scratch Resistant, Anti-slip, Heat Resistant (90℃)



Even charges the lastest Laptop
Support USB Type-C charging




Double press for low power charging

Safely charge low power devices as bluetooth headset or fitness bands.

Simply double press the power button to enter 2-hour low power charging.




Optimized charging / discharging efficiency

Up to 93% conversion rate
World-class chips not only are safer, but also improve charging conversion rate and stabilize discharging voltage with advanced resistance-capacitance sensors to optimize efficiency and durability.




World-class chipset protection
Nine layers of circuit protection

Mi Power Bank's adopted USB smart-control and charging / discharging chips provide
nine layers of circuit chip protection while enhancing efficiency.




Charging cable included
Support data transfers and charging

20000mAh ZMI Power Bank comes with a high-quality charging cable. The flat cable design prevents
tangles and is sheathed in a soft but durable, non-toxic TPE material that prevents cable damage.
Mirror polishing on the exterior surface allows for stains on the cable to be clean off easily. The cable
supports data transfers and can also be used for charging.


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