any wireless charging technology is based on electromagnetic induction, an effect that you might have learned about during physics class. Whenever an electric current flows through a wire, a magnetic field appears around that wire. the process also works in reverse. How is wireless charging works..... Well You need two coils, a transmitter coil and a receiver coil. An alternating current in the transmitter coil generates a magnetic field which induces a voltage in the receiver coil. This voltage can be used to power a mobile device or charge a battery