The electricity of the wireless charger is wireless charging through the principle of electromagnetic induction. It contains a transmitting coil and a receiving coil, and when connected to a power source, the transmitting coil generates an alternating magnetic field.
When the wireless charger is placed on a compatible device, the receiving coil senses the magnetic field generated by the transmitting coil and converts it into electrical energy for the device to charge. Therefore, the power supply of the wireless charger comes from an external power source, and wireless charging is achieved through magnetic field transmission, which is convenient and fast.