In the future, not only low-power appliances, but also common household appliances, medical equipment, power tools, office appliances, and kitchen appliances can be wirelessly charged. In fact, to be precise, it should be called "wireless power supply," that is, the use of electrical energy while transmitting, does not require any battery-like power storage device, and does not need to be charged in advance. At that time, the wires, patch panels, and batteries can all disappear. You can't even feel the power of electricity. It's like air, and it makes you feel like you're coming.