How does a wireless charging pad charge compatible devices?

@gregory_keeling 

A wireless charging pad, also known as an induction charger, charges compatible devices using the principle of electromagnetic induction.

The charging pad consists of a coil of wire that generates an alternating magnetic field when an electric current passes through it. When you place a compatible device, such as a smartphone or smartwatch, with wireless charging capabilities on the pad, the device's built-in coil picks up this magnetic field.

Inside the device, there is another coil, often located near the battery. This coil is designed to receive the alternating magnetic field and convert it back into an electric current. This current is then used to charge the device's battery.

The process is essentially the transfer of energy from the charging pad's coil to the device's coil, without the need for a physical connection like a traditional charging cable. It offers convenience by simply placing the device on the pad to initiate charging, without the hassle of plugging and unplugging cables.

@gregory_keeling 

A wireless charging pad charges compatible devices using a technology called inductive charging. The charging pad contains a coil that generates an electromagnetic field when connected to a power source. This coil creates an alternating current (AC) magnetic field.

The compatible device, such as a smartphone, tablet, or wireless earbuds, needs to have a corresponding coil or receiver built inside. When the device is placed on the charging pad, the coil in the device's receiver resonates with the magnetic field generated by the charging pad.

This resonance induces a current in the coil, which is then converted back to direct current (DC) by the device's internal circuitry, allowing it to charge the battery. The energy is transferred wirelessly from the charging pad to the device, eliminating the need for physical cables or connectors.