What is a wireless battery charging?

Cordless charging is generally referred to as wireless battery charging. It is a method for transferring electrical charges from a charger to the battery without the need of a physical wire.

Working Principle:It is based on the inductive principle in which magnetic field transfers energy from one device to another device. This principle is widely used to power many portable devices such as mobile phones and other wireless applications. Its working principle is quite similar to the transformers where primary coil is connected with the electrical supply as a main power source and the secondary coil is induced with electric charge ( in this case, it is a mobile phone).

Advantages: -  Wireless charging has the following benefits: -

1. As there is no physical connection that’s why there is no risk of reduced wear of plugs and sockets.
2. Convenience: - In this method, there are no messy cords and provides more convenient charging experience.
3. Multi-usage: - Wireless charging systems allow more than one portable device to charge as most of us have at least two or three devices.
4. It is highly resistive from dust and dirt because some applications operate in the very highly contaminated surroundings.

Disadvantages: - Besides its advantages, it has some disadvantages: -

1. Added complexity: - This system requires a more complicated system to transfer power to the wireless interface.
2. Added Cost: - Wireless charger is very expensive as it uses a more complicated system than the wired system.
3. Reduced efficiency: - it has very low efficiency due to resistive losses in the coil, stray coupling etc.