Wireless charging, also known as non-contact inductive charging, uses the principle of magnetic field resonance to transfer energy from the power supply device (charger) to the device that uses electricity. The two are not connected by wires. So chargers and devices that use electricity? ['Compared with wireless charging, the wired charging energy conversion is obtained in one time, the power loss is small, and energy-saving and environmental protection.', 'Using wirelessly charged devices can significantly reduce device wear.', 'High requirements for wireless charging technology and high price are the main reasons why it cannot be popular at this stage.', 'The longer the wireless transmission distance, the greater the loss of useless power.']