you know how you can send wifi signals?

from what I understand, this is just that on steroids except it’s used for energy instead of information

Moto release a similar one too.

I can steal my neighbors charging waves?

yeah, but, can someone eli5 how this works? Same principle with Wardenclyffe Tower?

I get inductive charging, but not this?

You don’t need 3 “base points”, you might just need 3 antenna on one basepoint. Look at wifi beamforming

But on your last point yes undoubtedly it will waste massive amounts of energy

hmm…
radio frequency is also energy, but a very different type. They use electricity frequency systems in railroad signalization, but that does not make the current targeted in physical lines, let alone targeted in a broadcast wave… I can understand how radio frequency waves pass through us – and I really don’t care about the health arguments concerning this. I really don’t understand how an electricity wave would pass through us without impacting us…

The best analogy would be zipping. a zipped exe is no more an exe, it then becomes an exe when unzipped by the other side. This should be how this work.. AC is a weird thing though, I don’t really get it.. If they found a way to tame it as such, that’s really a breakthrough…

I have heard of plans to implement this in public transportation. The idea is to maintain your battery or have it discharge at a slower pace so you don’t have to plug it in as often.

Charging a large number of phones in a public place is the only way it makes sense, otherwise it is indeed wasted electricity.

from what i read it should be able to output 5w even on multiple devices and with objects between the two on a few meter radius, not as fast as current charging but it’s something if they manage to commercialize it

Knowing how inefficient wireless charging is, the box will probably be a portable radiator and draw 200 watts. I’m sorry, but i’d rather have a super-fast wired charging system than an inefficient charger that has speeds straight outta 2009.

I wasn’t expecting such a quality reply in this sub. Thanks for taking the time to explain the limitations of the technology. 👍

It may not sound like a lot, but 5W is actually a quite impressive amount of power. Just to give some perspective, a regular USB 3.0 port is limited to 900 mA, that means whatever you connect to it is going to be receiving a maximum of 4.5 W. Yet, many people use their laptop to charge their phone if they are on the go.

This IS the true wireless charging and the way it should be.

How will this not cook my hand holding the phone with microwaves or whatever ? Is that why its only 5 watts

Tesla’s dreams are coming true

It’s honestly nice to see this technology, but I don’t think it’s going to be very healthy and the waste of energy will probably be huge.

Sounds dangerous but then again I know nothing.

The basepoint means 3 point where you measure the distance. It doesn’t matter whether it’s 3 antennas connected to the same device or 3 device with 1 antenna.

My point was that these points will be too close together to get an accurate measurement and the more inaccurate your positioning, the more energy you must use.

If this TRULY works then it’ll change more than the smartphone market.

Wireless sound bars and speakers that require no “recharge” just pair up and be charged forever… Earbuds constantly charging via reverse charge from a master device…

The real wireless charging.

That’s what I was referring when I talked about the phone tracking solution. It turned out I was right that’s how they do it. The problem with that was the probably quite poor real time tracking. With the antennas which are basically the previously mentioned “receiver base points”, meaning we basically calculate arrival of localization packets transmitted by the phone to the antenna and from the time differences of the arrival you can calculate the position of the transmitter.

Now the problem which you can clearly see is if the antennas are really close together the time driffrences will be really short. Since there is always constant measuring errors because we are not in a vacuum and EM waves are bouncing everywhere and there are objects in the way which slow down the signals, the smaller the time differences the more significant is the impact of these errors, therefore the location will be less precise.

Now there could be a solution when you just get the direction with the antennas and you do a so called two-way ranging with the phone and one of the antennas and you get the distance. The problem with that is that the phone constantly has to send and receive high energy packets and that will use up a lot of energy in the phone. I’m talking about 50-100mA constant power consumption. That’s really significant to the 4-5000mAh battery.

So you either get a phoen that’s constantly has to drain it’s battery while chargimg it or you get a less precise location. The less precise the location the more space you have to cover with the charging EM waves. The more space you have to cover, the more energy you just waste. This energy will transform to heat amd that’s really not healthy to anything in the room, especially you. Just imagine that the normal temperature of the human body is 36-37°C and at 38°C you have a fever and you feel like shit. Now imagine that your body is constantly bombarded with EM waves that turn into heat.

Since xiaomi has a lot resources and they probably figured something out I believe that they could achieve this wireless charging however I doubt that it’s going to be reliable.