The principle of electromagnetic induction is the basis for wireless charging. This is the same principle that powers induction stoves, which have been around for many years.
Now the availability of wireless charging devices is also on increase using the same technology. You can buy various good quality products of wireless charging devices like UTS 1 wireless charger via https://www.kewlabstech.com/product/uts-1-wireless-charger/.
In wireless charging, both the charging device and the receiver have wireless charging coils. The charging pad houses the transmitting coil. The battery is connected to the receiving coil, which is located at the back of your phone.
The transmitting coil converts electricity into an alternating electromagnetic force. The receiving coil converts the electricity into an electric current and sends it to the battery when it is in this field.
The Chinese concept of vital energy flowing through all living things is the inspiration for the Qi standard, which can be pronounced "chee"
The WPC has established the Qi standard. It defines power specifications that correspond to the energy flow between the charger and the device. Qi also contains a data transfer specification that allows the device to request the best power from the wireless charger.
A Medium power spec is also included in the Qi standard. It currently supports 30-65 W, but it's expected that it will eventually support 200 W. This spec can be used to power larger devices such as kitchen appliances, robot vacuum cleaners, power tools, and drones.