In an attempt to raise the standards, some of the handset makers including Apple, Samsung are moving towards wireless charging technology with the adoption of Qi wireless charging. So what exactly is this wireless charging? How do this work?
What is wireless charging?
When it comes to wireless charging, it uses magnetic induction and magnetic resonance. Wireless charging also needs a wire, but the wire is connected to a charging base instead of your phone, so you can just drop your phone onto it for charging. The charging space comes in various size and shapes. Having said that, you need to get the right spot on the back of your phone on the right spot on the base of the charger to make it work.
How does it work?
As we mentioned above, this tech uses induction and resonance to transmit power signals between the two surface. Saying that these devices are designed to transmit current without having to touch each other.
The base of the charger is plugged into the power supply and has a transmitter coil, while the phone has receiver coil. When the current is passed, the base station sends a signal out, and when a receiver coil gets close enough, a resonance change happens in the signal. Thus, the signal is changed and the charge begins.
The battery in the smartphone is connected to the coil and the battery is charged using the energy induced by the magnetic field.
Talking about the powermat, Qi isn't the only charging standard as there are others including Powermat and Rezence. These use a different standard than Qi but the logic is the same. In this case, Qi-enabled phone won't charge on a Powermat base due to signal variations.