The USB fan can be used when plugged into a power bank.
A USB fan is a micro electric fan used in the USB interface of a desktop computer or laptop computer. The USB port on the computer can provide external devices with a voltage of 5 volts of electricity, 500mA current, USB fan is a small fan that provides power with a USB interface, the charging bank generally provides 5 volts of electricity, the current is generally 1A or 2A, that is, the working current is larger than the usb fan, driving the fan is no problem, May reduce the life of the fan.
The charging function of the fan is the same as that of the mobile phone, so the power bank can be charged