Okay so we have gotten through both the Qi and PMA wireless charging standards. As you noticed, they are mostly only meant for charging small devices such as smartphones. Yes Qi does have different specifications coming out but they aren't as talked about yet. So now it is time to write about the 3rd most popular wireless charging standard called the Rezence. What is Rezence?Rezence is a standard developed Alliance For Wireless Power (A4WP) for transferring wireless power. When Qi and PMA was based on inductive power transfer then Rezence uses the principles of magnetic resonance. Rezence is able to generate up to 50W of power and that up to a 5cm distance. It consists of a power transmitter and power receiver. So basically same idea as the other wireless standards. However besides just generating way more power, it also uses a frequency that allows to charge up to 8 devices at the same time. The main idea of Rezence isn't just to power your smartphone. It is created for charging bigger devices such as laptops. For example Intel came out with a pretty big wireless charging area that did that as well. In the future we could see desks which entire surface is a huge wireless charging pad. So anything you place on your desk it starts charging. Alliance For Wireless PowerAs I mentioned before, the Rezence wireless charging standard is developed by an organisation called Alliance For Wireless Power (A4WP). A4WP consists of companies such as Intel, Broadcom, Gill Electronics, Qualcomm, WiTricity, Samsung Electronics.
In 2015 however A4WP decided to merge with Power Matters Alliance (PMA) and they formed AirFuel Alliance. So now both Rezence and PMA belong to the same Alliance and are being developed under it. The 2 standards are still being developed separately by different companies as they are still too different, which sadly makes it impossible for them to work together.
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