Wireless chargers utilise electromagnetic induction to charge batteries in portable devices like cellphones without requiring a physical connection. They often include a charging pad or stand on which the device is put, as well as a power adapter that connects the charging pad to an electrical outlet. When the device is put on the charging pad, an electromagnetic field is used to transmit energy from the pad to the device, charging the battery. Some contemporary smartphones and gadgets have built-in wireless charging capabilities, while others may necessitate the use of a separate wireless charging case or adapter in conjunction with the charging pad.