How Does Wireless Charging Work? - Tech2Craft

How Does Wireless Charging Work?

November 14, 2017

Wireless charging is becoming popular and is going to replace charging device using physical cables. Data displays that adoption of the wireless charging is increasing at a rapid phase. Each year new devices join the family of wireless charging. This year Apple launched iPhone X, iPhone 8 and iPhone 8 Plus which supports wireless charging. Also some popular android phones such as Galaxy S8, Galaxy Note 8 support wireless charging.


Wireless charging is of different types, some wireless chargers use magnetic induction and some use magnetic resonance. Both these tech work on the same principle of placing the device on the charging pad and charging without the use of physical cable.

How Wireless Charging Works?

We generally say the term wireless charging but it truly isn’t wireless. Your device such as phone, Smart watch, headphones or any other device doesn’t need to be plugged into the wall outlet to function but the charger still need to be plugged in to the wall. This was the reason which Apple described during iPhone 5 launch to not use wireless charging when Android devices had started using wireless charging. As of now Apple changed its mind after 5 years and brought wireless charging to its devices.

Wireless charger uses magnetic induction which means charger uses magnetic induction to transmit energy. When you place your device such as Smartphone on the charging pad, the current coming from the wall flows in the wireless charger creating magnetic field. This magnetic field in turn creates current in coil of the device placed over wireless charger thus creating electric energy, which charges battery of the device.

A device must have appropriate hardware to support wireless charging. In devices using magnetic resonance also work on same principle but in this device can be placed 45 mm from the charging pad. Thus device does not need to touch the charging pad. This is less efficient but also have some advantages major being that charger can be mounted on the table and device can be charged anywhere placed on the table.

Thus getting started with wireless charging is quite simple, you just need a device which supports wireless charging and a wireless charger. Thus in future wireless charging is going to become increasingly popular and devices supporting this tech would also increase.

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