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we've all had that moment you just lie down after a hard day of work and

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realize oh hamburgers i forgot to plug in my

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phone if only i could just magically charge it somewhere near my charger well

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that's actually a thing but how in the world do you get electricity to travel

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over distances further than what you get with current wireless charging pads that

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your phone has to physically sit on well to start off it helps to understand why

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something like qi charging or even electric toothbrush charger has to have

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a gadget basically touching it in order to transfer power these types of

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chargers work using a principle called electromagnetic induction you see when

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you plug in a wireless charger it creates a current in a loop of wire

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inside the charging pad this current in turn generates a magnetic field that can

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actually cause current to flow inside another nearby coil such as the one

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inside the charging spot on your phone or that electric toothbrush and although

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this isn't too difficult to implement the issue is that it only works over

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very short distances in fact the distances between the charger and the

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device has to be much shorter than the diameter of the coil in order for it to

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work properly we're talking like millimeters maybe even less here so one

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form of distance charging takes the induction mechanism and improves it by

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creating a resonance coupling you see currents connected to a capacitor like

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inside a wireless charger naturally have their current change direction due to

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the charge flowing from one end to the other going through the coil and then

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accumulating in the other end making the current then reverse itself this is

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called oscillation and the circuits have a natural frequency at which they'll

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oscillate so due to some pretty complicated physics that's like

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way beyond the scope of this video if you have two coils that oscillate at the

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same frequency they will resonate and that energy will actually travel more

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directly between them rather than just kind of going all over the place like

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with a regular inductive coil this means instead of having to place a gadget

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right on top of the charger the charger would instead work over a distance of

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several centimeters even up to tens of centimeters with larger coils working

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over longer distances this could prove useful not only for charging phones and

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laptops by putting them into a charging basket or something like that so even if

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they're just like a nearby charger and it's on your desk it still charges

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perfectly fine but also for keeping low power objects such as wireless mice

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smart home devices all that could just be perpetually powered with no wires at

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all and because of their improved efficiency resonant coupling can also be

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used to charge gadgets more quickly if you don't mind setting them atop a

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charging pad dell actually has a resonant charging pad that can put out

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30 watts of power to charge one of its laptops making it almost as fast as just

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having it plugged into the wall resonant induction is also being incorporated

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into a mercedes sedan where the car can just basically park over a coil in the

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ground and start charging without any need for those messy wires but if you

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want distance charging that works efficiently across say an entire room rf

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charging or infrared charging might be a better bet you know how you can put

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power in your home using light waves from the sun or how you can use

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microwaves to heat up last night's leftovers except for pizza because

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that's better cold well they both work using similar principles except without

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the risk of sunburn or being boiled alive rf uses lower frequency radio

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waves like your existing wi-fi router can transmit just a few milliwatts of

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power one company energis is hoping that their own rf charger will catch on and

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is marketing to be able to charge at distances of up to 15 feet but just like

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the light from a flashlight rf charging attenuates that is to say it gets weaker

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over a distance so placing a gadget near the edge of an rf charger's range means

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that you probably won't be getting enough power to charge your phone although a smaller device like a

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keyboard or a smartwatch might be fair game as for infrared charging we

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actually collaborated with a company who is working on this tech wecharge in a

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recent video where they showed us that even though ir can be used to transmit

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more power even several watts making it suitable for distant smartphone charging

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their handshake protocol stops transmission outright when it detects an

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obstacle like a human hand or your eyeballs which help to get approved for

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organizations like ul and fda there's still a lot of progress that can be made

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at this time there aren't many devices that have the necessary receivers built

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in for either rf or ir but if the technology matures we may be headed to a

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much more wire-free world in the not-so-distance future hopefully apple

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will build in support for one or both of these standards giving others the

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courage to adopt them and we'll start seeing compatible products on the market

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over the next few years but until then take a second to plug in your phone

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before bed there's no telling what you might miss on if you don't what you

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could be missing out on is ting ting is the mobile carrier that is focused on

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customer service and customer satisfaction first you don't speak to a

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robot and get put directly through to a person with ting you only pay for what

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you use with the average ting bill being 23 dollars a month per device

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and if you're stuck in a contract and switch to ting they'll cover 25 of your

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cancellation fee up to 75 they're lowering their mobile data rates data is

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now just 10 dollars per Gigabyte beyond the second Gigabyte and every single 10

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to techquickie.tang.com and try out their savings calculator when you sign up at

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hourlink you'll also get 25 dollars in service credit or 25 dollars towards a

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new device so thanks for watching like dislike check out our other videos but

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not channels what are you doing john are you just trying to sabotage LTT

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comment with video suggestions and don't forget to subscribe and follow