Wireless charging. We have some form of wireless charging now where we need to put our device on a pad. It’s still wireless, but requires contact. What Xiaomi shows off here is literal Nikola Tesla’s level of wireless power, and they’re calling it the Mi Air Charge Technology. It just shows off a little box as the source of power. Xiaomi also says that it doesn’t require cables or stands – which is obvious since their main objective for this technology is being to wirelessly charge from anywhere in the room.
Xiaomi announced in their official blog post that this technology is able to remotely charge your device at 5W. The technology behind it – in a more layman’s term – is by using isolated charging pile has five phase interference antennas built-in to create beamforming so that the “charging beam” is directed to your device only.
There is also a phase control array with 144 antennas that transmits millimeter-wide waves to your phone.
Xiaomi also claims that it can charge several devices within several meters away from the transmitter, and all of them are at up to 5W charging each. Xiaomi also claims that “physical obstacles do not reduce the charging efficiency” which I highly doubt.
Firstly, this technology uses a lot of ideas from how WiFi is transmitted. But, since both these technologies are essentially electromagnetic waves (EM waves), I highly doubt Xiaomi’s claim of “physical obstacles do not reduce the charging efficiency”. It’s vague.
If I just have a sheet of metal between me and the transmitter, I doubt I can get any charging at all. Also, what’s the efficiency? If the receiving power is 5W, that means the transmitting power is surely higher than 5W. So, is it safe to just transmit that high amount of power around the room?
Also, can my neighbors essentially steal my charger?
I have too many questions, honestly. There are no details and the descriptions are too vague. We’ll have to wait and see when and if this Mi Air Charge Technology makes it to the mass market.
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