Chinese mobile phone giant Xiaomi is reintroduduting a new Mi Air Charge technology that it says can turn on your smartphone from across the room, as soon as you get into a room with the system installed, your phone’s battery level starts to rise. Keep in mind that this kind of technology has been in the pipeline for years, and no one has yet brought it to market, but xiaomi demos look interesting. Xiaomi says room-scale wireless charging is now approaching reality with its new system.
The Mi Air Charge box that Xiaomi shows looks like a small coffee table. Inside is a five-phase interference antenna, which serves to place your smartphone indoors. A phase control array consisting of 144 other antennas then sends millimeter-wide waves to the phone.
Through a technique called beamforming, how to direct a wireless signal to a particular device, rather than spreading it in any direction around the room. The current technological incarnation offers 5-W charging within a few meters, and can work through other objects. The receiver phone also requires precise built-in components for all of this to function properly, a beacon antenna to broadcast the position of the phone, and an array of receiver antennas consisting of 14 separate antennas to convert millimeter wave signals into energy that can be accommodated by the phone’s battery.
This futuristic-looking box can charge multiple devices wirelessly at the same time. Furthermore, Xiaomi says that the batteries in our phones will continue to be recharged at all times while we are in a certain room. Smartwatches, speakers, desk lamps and other smart home products can all benefit.
Xiaomi has not officially provided information on when the Mi Air Charge system will be available, how much it will cost, and questions remain about how exactly it will work in practice. For now the company says it is in the “technology demo” stage and will not reach consumers as soon as 2022.
Xiaomi says, it looks like its hardware is already working to some extent, and Xiaomi has a strong enough track record in fast charging technology and wireless charging to show that it may be able to do this in the end. You can see the promotional videos xiaomi has collected about Mi Air Charge.