Since the device has a massive 30,000mAh capacity, it supports fast charging at up to 24W via USB-C. This means that if you have Xiaomi's 30W fast charger, you can top up the power bank in 7.5 hours. The micro-USB port, on the other hand, is limited to 18W.
The bank has two full-size USB-A ports, one USB-C, and one micro-USB. You can get 18W output from the USB-A and USB-C ports. The battery also has a low-current mode for small gadgets (e.g. smartwatches or Bluetooth earbuds) which have trouble charging from some power banks – this mode can be accessed by tapping the power button twice.