The fan is designed and manufactured to be rechargeable when the battery runs out, or it can also be used from mains power.
The fan is designed and manufactured to be rechargeable when the battery runs out, or it can also be used from the mains. The power supply and battery work the same, so they are usable. Because of the electricity inside. The electric fan converts electrical energy into wind energy, so it must be plugged in before it can spin. The electric fan converts electrical energy into wind energy, so it must be plugged in before it can rotate.