Wireless charging technology is from wireless power transmission technology. It transfer charge using magnetic resonance of the air in the charger and the device, the coil and capacitor form the resonance between the charger and devices to achieve efficient transmission of electricity.
Use the "resonance" principle of physics --- --- two objects with the same frequency can transfer energy efficiently
Electricity power in the cable is transmitted to an antenna made of copper
The antenna vibrates at 10 MHz to produce electromagnetic waves
The energy emitted by the antenna spread to 2 meters.
Laptops, which also vibrate at 10 MHz, receive current energy into the device
The energy that is not converted to a laptop computer will not be reabsorbed by the antenna and will not be disturbed by humans and other objects that do not produce 10 MHz resonance