How Does Wireless Charging Work?

How Does Wireless Charging Work?

qi logo


Qi is an established, evolving wireless charging standard owned by The Wireless Power Consortium and backed by more than 200 leading companies including Apple, Philips and Belkin. Their goal is to deliver wireless charging easily and safely, while ensuring compatibility across all devices that bear the Qi logo.

Qi standard products include:

  • iPhone X
  • iPhone 8 Plus
  • iPhone 8
  • Samsung Galaxy S8
  • Samsung Galaxy Note8

It’s important to make sure you have the right charger to charge your smartphone or tablet. Look for the Qi logo on packaging to check compatibility with your Qi phone before you buy.


There are two different types of Wireless Charging. Here’s what you need to know.

inductive charging

Requires direct physical contact between the phone and wireless charger. The charging coils inside the phone and the charger must be connected and aligned.

resonant charging

Requires the phone, wireless charger and charging coils within each, to be within a specific proximity but do not need to be touching.


The secret to how wireless charging works is electromagnetic induction:

  1. A transmitter coil in the charging base sends out a signal.
  2. The signal searches for a receiver coil, like the one in your compatible smartphone.
  3. When it senses one, electromagnetic induction begins.
  4. The electrons (electricity) inside the transmitter coil start to flow around in the coil.
  1. This generates a magnetic field, which is sensed by the electrons in the receiver coil
  2. The electrons trapped inside the receiver coil start to flow around the coil due to the magnetic field
  3. This flow of electrons inside the receiver coil is the electricity powering the battery in your smartphone.
how does wireless charging work

NOTE: Charging device must be no more than 8mm from the charging coil to receive charge from wireless power source.