The Xiaomi Portable Electric Air Compressor 2 Pro supports 9V/2A fast charging. Using a 5V/3A or 9V/2A power adapter, it takes about 3.5 hours to fully charge. During charging, the battery indicator will blink, and it will stay on for 20 seconds after fully charging before turning off.
Additionally, it can be charged using a power bank that meets the charging power and interface requirements (Type-C).
Note:
If the power indicator does not turn on when charging, it is recommended to replace the charging cable and adapter with compliant and safe alternatives and try charging again.