The Truth About Wireless Charging

[@vonneely1977]

I'm curious as to how Apple is going make sure their wireless chargers are incompatible with anyone else's.

[@jaredgarbo3679]

Jami Animations Yes because they won't need a Thunderbolt charging port. Simplifying the design.

[@Supcharged]

Their devices can be charged with any wireless charging pads

[@KnifeataGUNFYT1]

LOL! #Winning #PCMasterRace

[@Supcharged]

Merc E.Z. Your PC has wireless charging? Nice!

[@gabrieldarkr1]

Supercharged having I wireless pc sucks, its basicaly the same but you need double the energy to power it up, its like celebrating for paying 20 bucks for the exact burguer you use to pay 10

[@gaminggg]

Next thing you know, in the future we start asking: *”Can I get your charger password?”*

[@_Tzebra_]

Underrated comment. lol

[@memesfromdeepspace1075]

Apple migh do that

[@Rainbow__cookie]

Don't say to Apple that

[@jacobgilleo1728]

lol

[@fabulyzqueen582]

Delete this before they see this

[@keiyakins]

You know what I miss? The copper pads on the back or bottom of old PDAs so you just dropped it in a cradle, it aligned itself using physical forces and stuck a couple pins onto the pads. Simple, easy, and more efficient than wireless.

[@ybirch9735]

You can still buy that great technology if you buy and use a Sonim XP8 Smart Phone (Android). It's also a ruggidized industrial grade phone, with many features you can't get on name brand phones like iPhone. You can also buy extra batteries for your Sonim phone, and swap them out as needed (just like my old Blackberry phones).

[@_GhostMiner]

Yeah, bring these back instead of this wireless shit. The only wireless thing I use and like is wifi because you can't connect ethernet to a phone and it is practically impossible.

[@87advil]

@@_GhostMiner Belkin makes usb-c/lightning to ethernet adapters, although funnily enough people are mostly using the usb-c ones for laptops without ethernet ports.

[@callmefox630]

Technically those aren't *great* since they're exposed mains of a electronic, and they have a ease of tendency to get worn out, making connections difficult or shorting out the entire device very easily by just touching metalic things. I assume that's the reason behind all devices changing to cords

[@davecrupel2817]

​@@ybirch9735 Been seriously tempted to get a Sonim phone. If only for the durability, as im very rough on phones even though i try not to be.

[@equinox-XVI]

Now: *plugs phone into wall 2035: *walks into house *CHARGING*

[@darkdeath2529]

There's no need for a battery at that point. There was never a need for a battery. The technology was vaulted long ago

[@K31TH3R]

I'd be surprised if that was the case, and if it is the case a house would need to be a Faraday cage, as would clothing, and you'd essentially be wearing a tinfoil hat at all times. The technology for truly wireless and efficient power transmission already exists, and has existed for quite a long time. The problem is that the technology is inherently incompatible with our biology due the transmission frequency in the ELF range. ELF causes a whole bunch of problems with insect/bird navigation, as well as wreaking havoc on hormones/mood regulation/Circadian rhythm/etc.

[@spyc3311]

2050: *goes outside *charging*

[@youdotoo3]

But you still need a battery when you're in the sticks.

[@boriskalashnikov489]

Disney has a room that has a pole in the middle with a current so that no phone can run out of charge in said room without even plugging the phones in

[@hugemosey4471]

Doesn't need to carry a charger , oh I'll just carry my desk with a built in wireless charger

[@owenburges]

Lol

[@RealEngineering]

Huge thanks is needed to Mike from Mobox Graphics (link in description) for this video. Mike is a fellow mechanical engineer and animator. 95% of the work for this video was done by him, including the writing and editing. I just did some minor editorial work and the narration. Wouldn't be able to afford to employ him without Patreon and sponsors like brilliant.org/realengineering/

[@caralhoguy]

Real Engineering Okay

[@evanjames575]

Thanks mike

[@Mynx31]

Clearly we need massive EM fields close to our human bodies 24/7/365.

[@SsoulBlade]

Stupid question. Does the wireless charger lose current, energy or whatever if there is no device being charged? (while the charger is on)

[@Max201074]

what about influence on brain of electormagnetic waves?It's huge! Especially using long distance (1-2m)wireless charging. The brain will be boiled like in microwave oven.

[@iamstruck]

did he say a power rectifier? did he mean a *FULL BRIDGE RECTIFIER*

[@interupt0]

Most of these devices utilize half-wave rectification (located in the usb charging plug) to save on costs.

[@SirDella]

@@interupt0 it was a joke

[@OOZ662]

Whoa there, Clive.

[@prestongrav9842]

Boom

[@slonkazoid]

*RECTIFIER MAN*

[@fivish]

Wireless charging is very inefficient. Conventional transformers need complex laminated or ferrite cores to become efficient. With only air as the 'core' the technology is a poor replacement for a 99.9% efficient cable.

[@HuntingTarg]

Polymerous ferrite interfaces may become a thing as the technology develops, having the benefits of an iron-augmented field without the weight and expense of solid ferrite. My understanding tells me solid ferrite is only necessary for high-voltage or high-current applications. Also, a lot of efficiency can already be achieved through electronic optimization, which the video touched on and is only starting to emerge in the mobile device world.

[@arpitjain4025]

​@@HuntingTarg By no means Wireless charging can be more than 60% efficient.

[@TechRyze]

The cable might be 99%, but the charger itself that steps the voltage down to 5v is NOT.

[@arpitjain4025]

@@TechRyze wireless technology is replacement for cable, not charger. Same charger is being used for both so no question here about charger's efficiency.

[@ponraul1221]

@@TechRyze Okay, but if you have 60% efficiency via wireless induction to start with instead of 99% of wired conduction, you still waste 39% to begin with regardless of your charger.

[@lexer_]

If you can build an inductive charger into a parking lot you also can just build an automatic cable connector in instead. Inductive charging might have a little less moving parts but the inefficiency is just too big to be viable for widespread use.

[@lexer_]

@AllRandomThings Actually, inductors mainly consist of copper wire spools. So its probably a zero sum game at best.

[@some_dude_lolidk8338]

Wireless Charging in one word: Inefficient

[@TechRyze]

The charger that you already plug into the wall is inefficient.

[@jimv1983]

@@TechRyze wired chargers are about 90% efficient compared to wireless charging which is realistically about 40-45% efficient.

[@ponraul1221]

@Jan Boreczek exactly this is wire it will likely always be inferior to transmission via wire conductors. This is currently mostly a fad of being “modern and convenient”.

[@LHFX]

@@TechRyze Except that the wireless charging part is downstream from that charger. So you need to compare wireless charging with the wire, not the charger plugged into the wall. The wire itself is virtually 100% efficient.

[@adog9092]

Yeah it’s pretty frustrating to think that apple has removed a power brick claiming to save the environment yet is pushing wireless charging which is just less efficient. One thing that’s a bit misleading in this video, a majority of wireless phone chargers run off a 5V USB connection still, not the AC from the wall. So they still include all the inefficiencies of normal charging with an extra DC to AC and AC to DC conversion. If they could use the 50Hz AC power from the wall directly to the coil on the phone you could actually charge more efficient than using the USB cable. Texas Instruments have been working on 50Hz AC chargers but the end device would have to support it.

[@Aviator27J]

This affects 'current' technology ;)

[@kikotanto2980]

Jay Perrin i think I may have just died a little on the inside...

[@RBsRealm]

That joke is *Shockingly* bad...

[@Aviator27J]

Haha he said it, I just added emphasis :)

[@kaselier1116]

Boooo get off the stage

[@Ethan_Roberts]

That joke has *potential* you know.

[@philipjhonvillarta9800]

Sex robots, driverless electric cars, wireless charging and colonizing mars...here we go bois aliens will notice us now

[@budaisprincex9793]

Finally

[@MoStLy1aWaKE]

Aliens have noticed us. We just failed to free them from Area 51

[@shilohschwartz8671]

Hey that rhymes sort of

[@armin1576]

@@MoStLy1aWaKE Not this crap again.

[@HuntingTarg]

What if the really advanced aliens learned how to solve their technical problems with better civility and culture, rather than better technology? We care a lot about how we improve our tools, but we care very little about hiw we improve our thinking; journalism, criminology, jurisprudence, and civil law have not advanced much since the 19th Century; they have only become more complex and costly, to the point that they are practiced almost exclusively by experts. Technology however, from Smartphones to Ring, is everywhere.

[@revemb4653]

lol they should have a big plug on the front of the electric car and a receiving port on a pole . So all you have to do to charge the car is ram it into the pole.

[@imdarealkilla9933]

Super robot Knuckles wtf

[@jamescarter3196]

Lol, the Chevy Plug! That would be awesome!

[@claudejunkers4348]

Sounds too sexual don't you think ?

[@user-xq2fz5tz9t]

Honey I'm home! *RAMS

[@delta2257]

This person is smarter than Einstein

[@KnifeataGUNFYT1]

Can't believe I wasn't already signed up on your notifications but I DO check your channel often. Please don't change anything! As much as I want to see two or three of your vids per day, I LOVE the quality and clearly measured way your videos run and you educate. It's obvious you put effort and thought into your delivery and organization.

[@DogsBAwesome]

I'm glad you brought up the wastefulness of wireless charging, for big devices just plug the bugger in or have plates that raise to connect.

[@jacobopstad5483]

At this point, what really interests me is how efficient the technology is. I think we should all be concerned with how much energy we are consuming. Wireless charging is a cool idea but there have got to be better ways to do it.

[@vloggerzblogg6494]

kzbin.info/www/bejne/a4Kpl5SHh816hK8 j

[@birubu]

The only time I have wireless charging is in places I enter and leave often but don’t need to pick up my phone: namely my desk and car. Otherwise, wired is better, both for charging speed and the ability to actually use your phone while plugged in.

[@Ratkill9000]

Vehicles have them sometimes as a standard feature. Not every modern device is capable of wireless charging. Probably wont be more common for another 5 to 10 years.

[@chaon93]

For phones and small devices, its a matter of framing it in a more practical manner. The video cited that all phones being wireless would increase grid load by 23 GWh (23,000 MWh) per day. This sounds like a lot until you realize that global energy consumption is 62,500 GWh per day. Everyone using wireless smartphone chargers would be a 0.037% increase in electricity use. that is less than a 1/2500 increase. Wireless charging for cars however is an awful idea.

[@REA987]

Logic is simple; any mobile device (smartphone, tablet, laptop, music player, e-book) can still be used and charged at the same time while it was plugged to a power source. On the other hand, devices cannot be used effectively while being charged wirelessly since you cannot detache them unless you are okay with charging disruption. Just get a longer cable which can be extended and shortened.

[@megavoltservicesllc3515]

logic. use the wireless charger when you are asleep . . makes this all a moot point.

[@KramSacul]

You missed the point of wireless charging. All the times you set your phone down it could be charging.

[@megavoltservicesllc3515]

Exactly Kram. ! Esp when you are asleep. ..I assume most people do sleep right??

[@esecallum]

And of course with all that EM RADIATION everywhere from the millions of wireless chargers you are being COOKED slowly as well leading to health issues.

[@osmanozyurek1195]

REA987 kartal gol gol gol

[@IncroyablesExperiences]

For mobile phones it might look as a high overconsumption in MWh but if your consider a fraction of the total consumption it's nothing. About cars, to loose only 1% efficiency would have more impact than all mobile phones together, even 90% efficiency for a 20kW load it's awfull and will overcost soo much. Induction for mobile phone, of course, for cars, never!

[@bekr3473]

For cars it would be enough when two pins pop out of the ground to charge it

[@bigsassyster]

@@bekr3473 Tesla had something similar to that 8 years ago, but decided not to use it.

[@jcwoods2311]

You and all of your upvoters get the award for lacking the comprehension of scale. Mobile phone's growing data usage and the corresponding charging is incredibly wasteful and unnecessarily indulgent. My LiFePO 4 battery can jumpstart a V-8 engine 22 times (advertised as 25, I tested it) before needing a recharge but will only charge my Galaxy 10 phone 1& 1/2 times from 10% to 100%. Hypocritically scream and rant about excessive carbon footprint yet using far more than necessary without a second thought. Narcissistic wankers the whole lot.

[@jacobturnage]

Engineers should have to get English degrees if they want to be engineers just so that they don’t have to learn MMA.

[@vloggerzblogg6494]

kzbin.info/www/bejne/a4Kpl5SHh816hK8 j

[@JoeySocko]

The only problem is. Can we put our phones down long enough for it to charge?

[@gurjotsinghchadha]

Nailed it bro 👌

[@chrisbraid2907]

If we have pads for charging in our cars, on buses or even on a backpack with reserve power then we might ....

[@asnfhtmlzxsje274]

😄😄

[@Jaymac720]

Sleep. Also I have a wireless battery. It charges, and then I can put it on my phone and charge while I’m using it

[@danilonden3782]

@@chrisbraid2907 there are, problem with the wireless charging devices is that they plug into a wall. So your phone is still bound to the same wire. Difference is that every time you pick yo your phone it stops charging. And with a wire it continues. I have a wireless charging pad. And i used it once. Its absolutely useless. It would only work if it worked from within a meter or 2 reach. Otherwise its completely useless

[@akshaypatel1362]

I can charge my phone with wire in 1 hour while wireless takes about 3 hours so for me it's unnecessary investment to buy wireless charger Another benefit of wired charging is I can still use my mobile while charging .

[@chronictwister]

I have a wireless charger that charged my s9+ in 1 hour.

[@richardmann5049]

get a bluetooth headset.

[@gokulbalagopalpayyanur8080]

One plus 8 pro new wireless charger is fast

[@King8js_Plays]

Mine is 1 hour to charge and 15 hours

[@fivish]

The wireless charger has to be connected by WIRE to a charger!

[@jeabo0adhd]

Some ferric core transformers are 95% efficient. Air gap transformers can be helped by increasing the frequency and narrowing the distance between the coils.

[@megavoltservicesllc3515]

yup Qi is around 120 KHz. and they use ferrite pads In the T X and RX to shape the gap.

[@laharl2k]

Megavolt Services LLC Maybe they could use some magnets to help direct the flux better like they do in brusless motors

[@megavoltservicesllc3515]

perm mags would not really help. Infact it would add more lines of flux and * may * lead saturation however I am allwas open to a cheap test. I am more then willing to try some perm mags near and On a Q1 system.

[@turbomar6667]

jeabo0adhd comparing a pad to a transformer is like apples to oranges

[@nikoladd]

Charging a 2Wh phone at 40% efficiency is somewhat wasteful, but charging 50kWh cars at 40% efficiency is extremely wasteful. No grid in any country can handle that as of now.

[@jasondoe2596]

nikoladd, exactly! Not to mention, I'm not comfortable near multiple 100kW almost-omnidirectional antennas. Yes, it's non-ionising, yada-yada. Still.

[@simonm1447]

According to my information, wireless charging for electric cars can reach an efficiency of 90 % . Audi developed the Audi wireless charger, this system has an efficiency of 90 % www.audi.com/en/innovation/futuredrive/wireless_charging.html This system uses a mechanic device, which lifts the coil plate up until it has 1 cm gap between the coil plate and the car. Conventional cable chargers have more than 90 % efficiency, but they also don't have 100 %.

[@my80yearoldman]

And its not just the wireless efficiency loss, EV's still require a rectifier circuit @88% efficiency.

[@simonm1447]

That's true, the System with a cable has an efficiency of about 90 %, means from 10 kWh charged from the grid you have around 9 kWh in the battery to use. The wireless charger will cut another 10 %. But that's still a very high efficiency, compared to ICE cars. The engine of a gasoline car for example has an efficiency of around 35 % at the best, but in many situations the engine runs not in the most efficient rpm, and with lot of power available and only little power really used (for example powerful engine, but low speed) the efficiency decreases to 20 % or even less. Diesels are better in this point, but no combustion engine ever reached more than 50 % efficiency, while bigger electric motors can reach more than 90 %. The motor of the Model 3 for example (a synchronous motor with permanent magnets) has one of the best efficiencies ever reached.

[@nikoladd]

+Simon Maier .. well no 90% efficient transmission does not include the signal preparation or received power management. So it's at best 90% to the transmitter, then 90% to the receiver then multiple frequency rectification let's be optimistic and say 90% again... so it's 0.9^3= 0.73% of the power reaching the battery charger. So even in your sci-fi version it's losing at least a quarter of the power. It's a big amount of power when it comes to cars. My point was not that EV's are bad, quite the contrary. My point was that a workable wireless for cars has a lot of problems to solve.

[@Djjottum]

love your channel because i always learn something and love your voice. gods blessing and pls stay awsome

[@Jupiter__001_]

Steven Utter *tips fedora*

[@Friendship1nmillion]

Daan Sloots And he gave us a *Face Reveal* . 👍🖱📡💡📲♻️⚛

[@StarzzDrak]

5:45 wtf there is wire right under the phone whats the point of wasting 60% per 1cm ?

[@davidgatherer2073]

StarzzDrak agreed, in this age when resources are becoming more scares. It seem perverse that we’re going down this route. Yet another example of big business putting profit before ethics:(

[@Rebius]

of course, there's a wire, where do you think the wireless charger gets the power from? ;) But I agree if there is a need to have a cable, why just don't plug it right in the phone.

[@ponraul1221]

@@davidgatherer2073 I couldn’t care less if a business makes profit, good for them, good for the economy. A free market is the most efficient at utilizing scarce resources. This is simply an example of people once again being absolutely fucking stupid. This will continue to be stupid until it can beat the efficiency of wire conductors, which is improbable due to the inverse square law. This is all ironically in the age of environmentalism where governments are banning plastic straws and bags lmao. This is currently nothing more than a modern fashion statement.

[@fauzirahman3285]

@@davidgatherer2073 Agreed, if anything we should find ways to be more efficient instead of squandering it for minor conveniences.

[@grn1]

There is one advantage and my mom currently relies on it. It will work even if you're expensive phone's charge port doesn't (she should really get it replaced but the way she works plus the whole Covid thing makes that very difficult).

[@kipchickensout]

KZbin STOP TRANSLATING EVERY VIDEO TITLE INTO GERMAN IF IT'S NOT A GERMAN VIDEO I SPEAK ENGLISH AS WELL FFS //hä wo kommen die ganzen likes her o. O

[@noel.friedrich]

Omg I just thought that too. Aber "drahtloses laden" hat mich echt zum lachen gebracht

[@kipchickensout]

@@noel.friedrich xD

[@neosabien6998]

Ist echt so... If somebody knows how to turn this setting off, it'd be appreciated

[@ThomasTee]

@@neosabien6998 klick auf deinen Avatar. Sprachauswahl ist unter Dark Theme und über Settings :)

[@Treemaster16]

Matty L same but with russian:(

[@WillFuI]

Tesla was a freaking genius

[@FourDollaRacing]

Tesla was a nutjob....

[@JellybellyWaffles]

Didn’t he marry a pigeon or something? Someone correct me

[@Kadulikan]

@@JellybellyWaffles He tended to wounded pigeons, which probably led to that rumor

[@biliminsrlar5752]

@@JellybellyWaffles he didn't marry with them but near his dead he was started hating people because they were only wanting money so he started love pigeons and making inventions for them.But he was loving a one white pigeon like his wife...

[@InfernoBlade64]

FourDollaRacing Edison was a thief

[@maal9780]

Love your channel and videos. Its easy understand and enjoyable.

[@th1nk_outside]

i undertstand the topics but wtf are these "kerrs" xD

[@timingeternalis9704]

or you know, go back to removable batteries and just have a dock to charge an extra one man i miss my galaxy beam

[@Bizarro69]

You sir, are an imbicilic dinosaur.

[@AceGaimz]

But then my phone won't be made of shiny glass even though I keep a case on it.

[@esotericmelody9718]

I still have phone with removable battery I have 2 batteries just remove the drained one and replace with charge one

[@masterseeker360]

you could get one of those battery pack phone covers to have 2x the battery

[@alekz112]

@@Bizarro69 Why, because he has preferences? How incredibly privileged must one be, to take offense at other people's choice of smartphone.

[@sanderlahuis5698]

Reasons I watch his videos: 1. Accent 2. Accent 3. Accent 4. Interesting content 5. Accent

[@benhardsim8629]

whats wrong with the accent ?

[@covenantoflegions6825]

Benhard Sim he's saying it's nice

[@bourpislefoetus5814]

I agree with you, I have trouble with English but with his accent I don't know why but I understand

[@Jupiter__001_]

His accent is pretty grinding, but maybe that's just because I live to the North of Ireland ;)

[@carlotheatheist]

This guy has an accent. Which means they can't be trusted. #Electroboom!

[@GScottChaosnaut]

I used the Palm series of webOS mobiles, and the wireless inductive charging is something I miss to this day. With a magnetic, wireless dock, my mobile was not only always charged each time I picked it up, there was never a need to fiddle with wires. The best part of it, is that the mobile became an ambient display, always showing photos and social media like a smart photo frame.

[@unliving_ball_of_gas]

I feel like it is just a waste of elctricity to display something 24/7 that won't even be seen all the time. Just buy a picture frame.

[@megahunterkiller]

@@unliving_ball_of_gassorry I like seeing the pic of your mom and me raw dogging

[@engineer_pirate_hunter]

Props guys, I'm an EE student at a renowned University and we are working on the topic covered here (we're doing a bit better then DOE currently). I am completely surprised at the accuracy of the info here and thank you for informing people.

[@negritolindo8838]

This video is old, but. Can you help me understand efficiency here 5:10? what/who is the competitor?

[@Digalog]

A4WP: www.electronics-notes.com/articles/equipment-items-gadgets/wireless-battery-charging/a4wp-wireless-charging.php

[@negritolindo8838]

Thanks

[@redbloodedamerican2743]

Shut the fuck up, dumbass. “Renowned university” you couldn’t be more pretentious if you wanted to be. You’re probably a high school drop out.

[@jtgd]

@@redbloodedamerican2743 lol you sound like a dropout jealous that he’s from a prestigious school, not him

[@TS_Mind_Swept]

Nice to see that they are working on induction charging (for cars), I've mentioned it a few times and no one seems to know anything, but apparently it's been in the works which is good to hear. On phones though, it restricts the movement in the same way, if not more because it's harder to move the pad with the phone, and putting it in is hardly any less convenient, so those don't even seem necessary (they're neat, but that's about it)

[@Kyouske_42]

1:30 The shown simplified sketch of the circuit bothers me. The battery provides DC, which would cause the volt meter on the other side to show a pulse upon connecting and then drop to zero. To transmit energy effectively you need AC as only a change in the magnetic field will induce a current.

[@aceline9087]

What about sealed batteries that would explode without DC charging.

[@manabouttongue]

the circuit connected to the battery on the receiver side contains a rectifier that changes the induced AC current into DC.

[@sensiblewheels]

@@manabouttongue Yeah but the input needs to be an alternative current or a pulsating direct current.

[@Roxor128]

Why not have a little robotic arm for plugging in a standard charging plug at the front of each parking spot instead of wasting power on inductive charging? Pull up and turn off the car, the bay-bot comes out of its shelter, reads the car's numberplate, so it knows who to bill for the power, and plugs a charging cable into the front of the car. Once it's charged, or you come back early and unlock the car, the arm unplugs the charger and bills your account with the department of transport for the power used. Same convenience, much less wasted power.

[@olaruud9366]

or just a two prong thingy that robot mowers use that is flexible.

[@Jupiter__001_]

Car charging is free in the UK, so you wouldn't even need a reader.

[@carguy466]

"Same convenince"

[@tiredpoison5784]

I have a better idea. A folded arm plugs itself in the bottom of the car and bills you by some sort of ID your battery is registered too or something like that. It would be way less expensive and for those who will say that you'd need to park perfectly just have it scan for the plug and move on over and plug itself in

[@hkr667]

I was thinking the same thing. In both cases the user (car driver) has to do nothing, which is the key point. I see no big hurdles. Heck, even our vacuum cleaners can already do this. It would require relatively little engineering. Only standardization.

[@JoshXII]

Great Video ,really enjoyed it. Not my favorite topic, but paid out in the end. It defenitly is up to your usual quality (shoutout to Mike) and I liked the twist with the efficency question, that is something I never thought about. It is a shame that KZbin is killing itself with its algorithm lately. Keep it up, I am always looking forward to your Videos .They are informativ ,very high quality , entertaining and I love your approach at these topics.

[@trispectre8366]

JoshXII Your comment says 10 hours ago...

[@JoshXII]

Trispectre Thats when it got released on Patreon 👍

[@moboxgraphics]

Glad you enjoyed!

[@samueltukua3061]

0:21 Me: Do not go gentle into that good night! Rage, rage, against the dying of the light!

[@eddiebalosin6826]

* Interstellar theme song begins *

[@10uRization]

:'(

[@timjohnson1199]

Laziness

[@bappoprottecandbappoattacc107]

You don't look so bad for pushing 120

[@peterstoichkov9518]

I was wondering at 6:00 you said Tesla model 3 but on the screen was model s which one is it. And keep it up man. Me and my math teacher love your videos.

[@RealEngineering]

Mistake in the narration. We only caught it after I had left Ireland for a holiday.

[@peterstoichkov9518]

Real Engineering Thanks you.

[@SirBenJamin_]

You're Irish? ;) :P

[@aramalbarzngi9769]

You could add a notation on screen just to avert confusion. Great video though! :)

[@sebastianelytron8450]

Another mistake is "unmeasurably" instead of the correct "immeasurably" in that context at 1:59 but hey, Faraday made mistakes too.

[@kn7gez]

A Tesla S = another house on the grid. Doubtful. Means my power bill would double if I had one. Doubtful.

[@erichdiebenow4727]

Wrong lol

[@WereReallyRelayCamping]

this channel is full of bs

[@myes344]

Idiot run car or truck is 10cent to 30cent per mile. Electric car is 1 cent. Also no oil change/coolant/all the good stuff

[@alekz112]

Yeah, this channel seems to have slipped a fair bit in the last two years . Hope he doesn't go the way of Thuderf00t. Which would be ironic since the guy hates Thunderf00t.

[@PlaystationMasterPS3]

I mean, I only pay like $50/month for power as is, so if you drive a lot it's probably fine

[@LTCAproductions]

The only reason I’m willing to part ways with the charger port is to improve the waterproof capabilities of phones. I wasn’t ready to get rid of the audio jack but I’ve since caught up

[@irok1]

Gonna want USB connectivity either way, so let's keep the aux

[@bradhaines3142]

@@irok1 yeah, file transfer would be a pain, especially any kind of physical backup

[@tristiangaming]

I will always want a audio port even through the dongle apple won’t ever get rid of the port

[@guillermoalcantaragonzalez6532]

Your Chanel is one of my latest foundings at youtube and it's like my new favorite series.

[@Kunzopolis]

USB-C is so incredibly fast that unless wireless charging is somehow insanely efficient, i don't see the point. for those who are not in the know, my nexus 6p can charge from ~30%->100% in less than 1 hour.

[@megavoltservicesllc3515]

C is rated to 15 watts. The latest Rev to the QI3 standard can do more then 12W . having both is a WIN WIN. Its not like the added guts to put

[@Goldenman89327]

I dont think the efficiency is the main thing with wireless charging. I think its made to be convenient, it would be really nice to eventually just be in a room and have it charge my phone in my pocket.

[@megavoltservicesllc3515]

I am fully aware. I am HUGE advocate for USB-C with PD3 . how does that massive current dump day by day effect batt cell lifespan any EE worth there salt knows dump charging is not good for long term lifespan. I advocate for QI as a baseline . Its fast enough to charge any phone and most tablets overnight at a 1-2 amp rate . Yall are getting 8 H of sleep right? provided you can get a day out of a charge then who cares If at night in your 8H of sleep your phone takes 3H vs 1.5 h... does that matter. VS Weigh in the wear you put on your USB jack . Is it cost effective to replace a $800 phone over a loss in % eff in charge rate. what is the envro damage of a useless bricked phone due to a ripped plug Vs the extra power needed to make up for driving a 90% eff QI charger. does any one weigh this as math. ???? The power to refine the silicon to make the chips. the power to machine or Injection mold a case . power to reflow the solder on to a PCB that takes power to cut ! Now lets talk disposal of the now useless phone and its effect on a landfill and last but not least the biz cost If I have to take time to buy a new phone and then take a day to Xfer the apps and get * settled in * how much is your time worth lets say the loss of lossy QI charge means over a year you pay $16 more in power. ( $16 buys a TON of kWH by the way! ) If I take time off of my day to buy a new phone . see my point.

[@piusg]

I have an LG v20, whose USB C charging is pretty darn fast. However, its battery is removable, as batteries used to be, and should be today if not for greedy phone manufacturers and planned obsolescence. My v20 goes from dead flat to 100% charge in under a minute. No charging technology can ever beat that.

[@danielfronc4304]

Goldenman Yeah, and slowly over time such rooms would cook your gonads. A variation on it sterilized my brother after 15 years in the field.

[@bobisthebuilder3982]

Great video. I liked the fact you broke the technology down so the average person can understand it.

[@Kadoc0]

I wonder if the earth sometimes makes fun of the moon for having no life?

[@iclynnx]

Kadoc Great joke there xD 100/10

[@תומרקחלון]

Kadoc i wonder if youve skipped english class

[@Kadoc0]

troll gaming IL Oh you know, when English is not your first language ;)

[@תומרקחלון]

Kadoc no shit sherlock

[@BillyBob-bo9tn]

troll gaming IL why are you being such a douche?

[@garyha2650]

3:33 Holy cow those pancake coils are a work of art. Not all connected together, wonder how that functions.

[@arpitjain4025]

those are just to cover more area so that phone/device can be placed anywhere on charging pad.

[@senseoflife3582]

Wireless Charging saved my ass already twice just when the charging ports of two of my phones died.

[@owenburges]

Samsung phones? Yeah that happened to me too

[@TerryMundy]

This is the first of your videos that I watched. I've subscribed and hope to watch more in the future. You've done a pretty good job.

[@capt.Millenial]

3 words. GENIOUS NIKOLA TESLA

[@str8ballin297]

tonydaletony did you spell Tesla wrong on purpose? Big booty latinas are one of my favorite tho

[@inspiregrow2336]

Nikola Tesla is ❤

[@Sugarstaches]

1:09 was trippy af! I thought it he personalized the video to fit everyone’s name somehow lmao

[@inyoface5456]

Fuk das trippy

[@abirulislam1512]

Did he say "Tesla Model 3" and show a Tesla Model S? *TESLA FANBOYS TRIGGERED*

[@gubgubgub]

yep

[@tparadox88]

I'm just wondering which one the data is actually from.

[@ocluke80]

Yes. That's it, I want my money back.

[@guppy360]

This channel is OBSESSED with Tesla. They bring it up whenever they can. A company with an egomaniacal sociopath snake oil salesman who tries to rebadge inventions of others as his own.

[@yolky6535]

@@guppy360 69Likes

[@sanjuansteve]

Great video! We should focus more on efficiency.

[@julianchee2894]

Wireless charging in this form is overrated. You can’t hold up your phone while wirelessly charging it

[@mzflighter6905]

So there comes a fucking Sci-Fi solution! A piece of copper covered with an insulator! almost 100% efficiency, coasting 100 times less

[@patrickelliott2169]

Actually, the problem with "most" of these systems is that they are uni-directional, and short ranged. There is one startup company, though it hasn't yet shipped a final product, which uses 3 coils, set up to provide multi-directional charging, and, presumably, a bit greater range. You need only be "near" the so called "motherbox", or its smaller portable version, to get your phone to charge, presumably. So, yeah, with it, assuming it really works as advertised, you can use your phone, while it charges, instead of having to lay the thing down some place. But, in something like a car, this is less of an issue, since.. you shouldn't bloody well be using it that way in the first place (and is technically illegal in many places), and most cars now allow wireless syncing for hands free operation.

[@Kurama_02]

Patrick Elliott isnt the omni directional wireless charger called Pi? I read about it a few months ago.

[@tristan2064]

If you want to be farther from the outlet just get a longer wire XD

[@patrickelliott2169]

Its possible there is more than one such project out there. This is the project I am talking about. www.indiegogo.com/projects/the-motherbox-true-wireless-charging--2/x/5163787#/

[@filipkaticic6877]

Love how Nikola Tesla managed to light up 200 lightbulbs 40 km away wirelessly hundred years ago and today we are being sold all kinds of crap for so much money.

[@josephdickson3531]

5:15 59.4% efficiency!? Heck, I'm not that inconvenienced by plugging stuff in to charge! You've forgotten to mention that Nikola Tesla sought to create long range wireless power transmission, and died trying to improve the significant inefficiency. I will take his valiant attempts as a sign that wire power transmission is the way to go. I wouldn't be surprised if smart cars are able to plug themselves in to a socket soon. :P

[@maxxiang8746]

thats the problem, Joseph Dickson, and 60% efficiency i believe is already pretty close to the practical limit.

[@pwnmeisterage]

40%~60% efficiency means multiplying total power consumption (and power bill) by 168%~250%. Sadly, I think most people will plug in the electric vehicle to save a few dollars every night while they also won't bother with the inconvenience of plugging in their mobile device to save a couple pennies.

[@keithbrown7685]

If a roomba can.. would it be somehow a matter of upscaling? I don't know.

[@festiverespecttrackingfanc6644]

Efficiency is Bae (edit: and by "Bae" of course I mean good)

[@carguy466]

Practicality is...

[@ThatCamel104]

Why not both?

[@asdasdas185]

hope your comment gets deleted

[@VapeJohn]

*bad. Very bad.

[@aflhabalafhabab]

Festive respect tracking Fancy Fedora Are you saying that efficiency is shit?

[@RilfDanielson]

This video seems to be the only video to explain wireless charging with animated diagrams, which I needed to understand the concept. So awesome job there, thank you. Everyone else just talks about this stuff like I am supposed to understand what it means. For anyone who wants to know how wireless charging works, skip to 2:22 and only watch the animated diagram parts, the rest of the video is kind of needless.

[@thedirty530]

This is the calm before the storm of a the future we all have dreamed of...once it becomes widely profitable...I have faith that we will jump in head first...We are so close to energy efficient breakthroughs!

[@drac124]

What do you prefer: slim phone or 1 week battery? With less than 5mm you can have 1 week worth of battery. Plug the phone to the wall would not be such a problem anymore.

[@DylanM15]

Douglas exactly. A bigger device optimized battery that can last 3+ days makes more sense. Most companies just choose not to put large batteries in phones when they easily could. iPhones use like 2700 mAh now. I can’t imagine how much longer a 4000 mAh battery optimized in an iPhone would last. Easily 3 days when a 2700 will easily last 1 day.

[@babybirdhome]

Since they've made both kinds over the years and the market has chosen slim phones, I'm gonna go with slim phones as the correct answer here.

[@moover123]

@@babybirdhome actually, good phones with a bug battery have only or at least more been made in the recent time, they just have to be adapted by the consumer more, and I believe that will happen. I think it's just that there were other problems before, such as enough memory for example.

[@VibeCheckerzz]

i prefer a thicker phone with a better battery than one i am afraid to even handle bcs is so thin

[@pwnmeisterage]

Some of us want to buy tech, not fashion.

[@Vega-lw5tl]

i just ordered a wireless charger from amazon and came back to youtube and this video poped up in my subscription box ... strange coincidence :o

[@Spartan0430]

believe it or not, google/internet services tracks what you do to show you things that they think will interest you!

[@SolarHomerSimpson]

Why can we just have removable batteries to change our. ..grrr

[@Nicholas-f5]

Apple profits.

[@diggles27]

There are plenty of decent phone models out there that don't support designed obsolescence

[@Stefan-]

Pepper LePew Pretty much all mobil phones used to have that 20 years ago or so...

[@crunchybanana6616]

Stefan Sjöberg bring several batteries.. grrrr

[@FlowMo]

this ain't xbox bro

[@JackiePrime]

MagSafe (magnetic power cables) is the wAy to go

[@dilthepickle5346]

I’ve seen stores with charging stations, but usually no one uses them out of fear of loosing their phones.

[@Speedj2]

this. these people who are going on about all these public charge options arent really thinking about practically applying these ideas in a world where free public utilities are always very poorly maintained (or even vandalized) and using them is risky at best. and honestly, do people really think they might one day be able to charge their battery while sitting at a red light? like, oh yeah, just because we can now charge things wirelessly, the city is just gonna start handing out free power at redlights. pure fantasy.

[@babybirdhome]

Speedj2 no one expects it to be free. You'd pay for the power the same way you pay for everything that anti-government people try to pretend anyone thinks is actually free - with taxes. Like the taxes you pay when you buy a car, or register a car, or pay your electric bill, and so on and so on. Those roads everyone is driving on today? When is the last time you wrote a check to have it resurfaced or chip sealed? Never. Are they free then? No. They're paid for with taxes just like everything public. Only a moron would pretend anyone thinks this would be any different. Come back and join everyone in the real world.

[@GeorgeD1]

I think that being able to wirelessly charge my phone is simply amazing, and I have gotten so used to it that the lack of it would be a deal breaker for future phones I would consider. Firstly, I am not a heavy user and my phone (a nearly two-year-old S7 Edge) regularly lasts me around 70 hours between charges. I have a wireless charger integrated in my bedside lamp, so I just put it down before I go to sleep and then simply pick it up in the morning, no hassle at all - no wires, plugging and unplugging from the wall. I honestly don't even know where my standard charger is right now, I haven't used it in a long time.

[@megavoltservicesllc3515]

and that is what its exaclty made for........ night use. and perhaps in a Car clamp mount .

[@damonzhao352]

Our company has a new wireless charger that needs to be tested for free. Are you interested?

[@Kokozaftran]

Sounds really inefficient.

[@jonasplett172]

“Into technology, and beyond!!” Love that lol

[@jacktownsend6046]

You totally just got featured in a Popular Mechanics article about wireless charging 👏🏻

[@naznasty5700]

Just want to say this is extremely high quality content, well done. Thank you!

[@metanumia]

What would happen if someone with an internal cardiac pacemaker implant were to walk over a section of street which had an inductive wireless charging circuit below the pavement in a parking spot meant for electric vehicles like the one shown in the video? Would it just charge up the battery inside the pacemaker? Or, would it overload the circuits in the pacemaker and kill the pedestrian? Thanks for another great video Real Engineering!

[@TeodorKubena]

Every modern electric device has protection to overcharging. He wouldn't die.

[@garrettwright4337]

Anodyne Melody from what I know of pacemakers there is no battery

[@ishortsclips]

He will become John Travolta

[@caccamerdaputtanaeva]

@@garrettwright4337 There must be batteries, how else you think it is gonna beat your heart if it stops?

[@KickyFut]

Yeah, of course there's a battery! Once installed the pacemaker is in a relatively easy place to access as the battery needs to be changed every 10-18yrs depending on how active the person is. Those car chargers don't really affect people because they're not always on, however metal detectors can have an affect on pacemakers. That's why they need to be wanded seperately.

[@LKonstantina915]

Just charge your phone when you are asleep, problem solved. Wireless charging is just a gimmick at this point. Phone batteries are large enough to opparate for many hours. If anything, you arent gonna use your phone ALL day right? Not gonna say anything about the possible health effects very low frequency radiation has..

[@philosophicalinquirer312]

4th Generation nuclear - all problems solved. -Super Efficient - Safe (if not cut corners or idiotic negligence) - Not add CO2/Greenhouse gases - Manageable waste - Not obscene to environmental aesthetics (such as wind turbines) In Sunnier countries with lots of space can also build super solar cell "villages" as a power stations and find ways of storing the solar energy by exporting it as batteries. (not exactly clean, the batteries do use rare earth metals that require extraction and energy - but unlimited energy supply via solar power) Excluding Chernobyl with utterly gross negligence, Nuclear is by far the safest energy, more people have died from wind turbines and solar cells !!! (its true !)

[@FunnyMemes-dr3se]

Some people don't get that... but if you ask me, Andrew Yang does (presidential candidate) does... he mentioned Thorium reactors in a debate on climate change, and he believes in a nuclear powered future, as nuclear power is getting safer and more efficient. If you can, please vote Andrew Yang as the Democratic candidate so we can get a smart president (that understands potentials in science through statistics, since what he says actually make a lot of sense).

[@aki-lucky8345]

The problem isn't that it's dangerous, it's that people are scared of how big the damage is when something happens. Not that it would but the idea is still in people's heads and if you life near one that would be terrifying

[@xmtxx]

@philosophical inquirer. You forgot about Fukushima. They weren't incompetent, yet they didn't knew what they were doing. Couldn't prevent core meltdown, and it took 6 year to locate corium. We were really close to a huge disaster. The equipment they would have needed to handle the situation didn't even exists (and it don't know if it even exists today). It will take decades to clean up the mess, and they have to invent solutions afterward, to handle it. Yet, experts were telling us that they knew what they were doing. Obviously, they weren't. 4th generation have many times more fissile material than Fukushima. Safe? coolant would be sodium, which explode when in contact of water.... Come on.... This industry is almost 70 years old, and it still doesn't know how to handle its waste. For some time they were dumping radioactive barrels at the bottom of the ocean! I don't believe thoses experts anymore. Maybe some other nuclear technologies could be safe by design but it would mean almost starting R&D from 0 , would take decades and cost huge amount of money. Even thorium that we hear some time, like Funny Memes talk about, is far from being proven, and has it's own downside. About aesthetics of wind turbines, I find it pretty pleasing. But even though it is ugly, who cares when you are putting safety into the balance?

[@texxstalker]

Thorium reactor cannot meltdown because its design

[@hadassah6563]

@@aki-lucky8345 that is why Australia should experiment with it first. We have plenty of space lol. Thing is, we have so many environmentalists who swear that nuclear energy is of satan

[@stupidhatmanjoshua7640]

Ah yes, even more energy bouncing around our houses to slowly cook our brains

[@99999bomb]

Electoral megnatisim will not hurt the brain idiot

[@bensneller5797]

@@99999bomb it’s a joke idiot

[@tetlamed]

You showed the Model S while you said "the Tesla Model 3" at 5:59

[@jacobs483]

Rarely is efficiency achieved without practice and motivation. Both take time and money, plus some faith and patience.

[@Laceykat66]

4:45 - LOL, gotta love it. "seeking out a parking space" because they are always readily available and near where you are. Particularly downtown. Let's get real. Your autonomous car will be driving around for hours looking for a parking spot just like humans do now. Thank you for the information though. I have a wireless charger for my phone and had no idea how it worked.

[@neo778]

Inductive charging is (now) NO good technology for charging everyday due to bad effiency. All technology should be measusered on efficiency and the ability to recycle materials of devices. after use!

[@earthelucidator]

Because it's not done correctly with Tesla coil.

[@ssing7113]

And what about aesthetics? Bringing wires to be hidden in furniture and under counters and desks. The future will be hidden wiring absolutely and or wireless. So you are using cat5 to access the internet and no WiFi? Second when we talk of efficiency that’s a long talk as it never a end what we all waste energy. Time. Money on....

[@yet_another_communist]

@@ssing7113 yes, 'cause comparing cat5 and wifi is the same as comparing a inefficient technology and a efficient technology. The problem of the humanity: Inventing problems to a solution, not solutions for a problem.

[@glenwaldrop8166]

If the manufacturers would just allow the phone to be a little heavier we wouldn't have battery life issues. Also, lithium batteries have advanced, I picked up a double capacity lithium ion battery for my S4 that is the exact same size as the old one. Capacity confirmed, battery life is amazing.

[@jasoneel76]

It probably doesn’t have the same fast charge capacity

[@glenwaldrop8166]

@@jasoneel76 Dunno, didn't have any problem with it until I screwed up, killed the phone. I didn't get to put the battery through it's paces properly, phone only lasted a few months after I got the battery.

[@АлексейДмитриев-ш1ф]

@@glenwaldrop8166 sorry mate but what you are saying sounds like a 100% BS. There is no such thing as double capacity battery with the same technology (especially for samsung s4, a relatively new device), and there is no such thing as cycling lithium battery to ramp it up to max capacity. What you bought is lowest quality noname cell with fake specs, no wonder it died almost immediately

[@glenwaldrop8166]

@@АлексейДмитриев-ш1ф The battery didn't die, the phone did. The S4 is not a new device. I plugged my smart charger into a hub to charge more than one phone, didn't think about it, smoked two old phones. The new battery lasted 24 hours, the original never came close. I didn't say the brand, I'm not trying to sell anyone on it so why don't you fuck right off.

[@АлексейДмитриев-ш1ф]

@@glenwaldrop8166 okay man. So if you say something wrong, you just mistaken. If you continue insisting on wrong sentence, you are a liar. You are a liar, definitely. You said "Capacity confirmed". So what exactly the capacity meter name you've used? I bet it's "the new battery lasted 24 hours" model? Is it calibrated? Lol

[@obfuscated3090]

Pads avoid wearing out USB C connectors. That's the only reason I ordered one since except for file transfer (cable is far faster than Bluetooth) it eliminates need to connect a cable.

[@Rebius]

How much do you connect your phone??? I have mine for several years without any issues. Maybe you don't use it right?

[@disconer]

Funny that he added Tesla in the doc, but Tesla vision was to deliver electricity wirelessly as well, which also was his downfall. No one was going to invest into structures that would deliver free anything, so he never got the sponsorship he was hoping for, he had no choice but to close up Wardenclyffe. He was on the right track with so many things but he wasted it on dreams that would never be reality. Could have been great.

[@sheonpeebles3152]

No connector to wear out! that killed my last 5 phones so I'm sold.

[@VibeCheckerzz]

i repaired it for 5 pounds

[@fleetwoodbeechbum]

That's what I was thinking. We are not necessarily talking about wireless charging at 20 feet away. Just basically no mechanical connector to wear out. Experience that at that wrong time and you are no longer quibbling over a bit of inefficiency. No one is talking about how they didn't have a usable phone numerous times because the connector was not reliable. Been there while out of town.

[@sheonpeebles3152]

@@VibeCheckerzz where did you get it fixed I got two good phones here with the same problem ?

[@sheonpeebles3152]

@@fleetwoodbeechbum I need new glasses, can't see witch way the plug is sometimes get in a hurry and mess it up.

[@farfromirrational948]

@@sheonpeebles3152 do you hear yourself? You can't see very well so you BREAK YOUR PHONE due to impatients and incompetance....take a deep breathe....slow down....you know you've now done this to 5 phones....learn from your mistakes jeez...... No no let's charge our batteries with a tool that WASTES energy...you know because we are consumers that don't care about anything but ourselves

[@micahkole3903]

A old person be like-"What back in my day."Young person- "Yes,Yes you did"

[@lindsaywheatcroft8247]

As I understand it, combustion vehicles generally have an energy efficiency of 20%. Let’s consider the opportunity costs. Even if we only went with the 40% efficient charging system, and even if only half the extra grid energy were to come from clean sources, and even if none of the vehicles had a solar panel roof, an inductively charged road network would still yield a net reduction in emissions Bonuses: - what emissions continued to happen would do so in large, remote, static facilities that can have massive filters, as opposed to gridlock smogs in urban areas with That Guy spewing horrific black fumes - less need for road transit of fuel to petrol stations - less physical wear & tear on ports Drawbacks: - what are we going to make all these batteries out of, where are we going to get the raw materials from, what are we going to do with the spent units - market pressure to enforce proprietary elements that fragment the market. Like trying to find a lightning charger, but you need to to get home

[@dogol284]

Maybe I’m just tired but I think it’s amazing how 10 years ago driverless cars seemed like a pipedream but now we just refer to them so casually. In the 1960s they viewed driverless cars as magical, but now it’s almost become a standard.

[@simmerke1111]

I doubt this is going to make an impact for phones. Cars, Laptops, PC's,... Stuff you have to place down to work on or leave stationary for a while. That is what this technology is good for. Increasing the range will inevitably reduce efficiency. A charger for a car that detects when you're in park mode and raises closer to the receiver would be cool though. I hope Tesla and other manufacturers are working on something like that.

[@NathanHaaren]

you can charge your car wirelessly and lose 10% of energy or you can use 0.1% of the energy for a robot arm that searches a charger and plugs itself in when you park your car or u can plug your car in manually and waste no energy I wouldn't choose wireless charging even if it were only 1% energy loss, unless all energy was provided by solar power, wind power and hydropower, but we're a long way from using 100% renewable energy

[@jeffo9401]

I *LEARNED* something today!

[@overthinkgenius6932]

0:13 that lady is wearing the fourth hokage's Jacket!

[@animestream1013]

4th

[@Eternap]

xD

[@petert3355]

The idea thing here would be for a feedback mechanism in the inductive charger for cars. Car pulls up, signal sent to charger to start charging, Charge pad starts charging, when battery is full, Wireless signal sent back to charge pad to shut off. This would be the least load on the utility network in my book.

[@jan_harald]

THE single reason why people want wireless charging: broken cables and to a lesser extent, broken ports (if you're using it for years)

[@MrHBSoftware]

design a watertight and hard to break jack and socket...even i can do that...rubber grommet and cylindrical dc jack...boom...you guys must eat ice creams with you forehead

[@DmitriyLaktyushkin]

That efficient wireless charging station looked like it raised up real close to the vehicle to get that quality coupling, am I the only one wondering why they didn't just add contact pads and charge that way? Simpler and more efficient.

[@keith2964]

Whole new meaning to: Cash or Charge!

[@vladbcom]

5:30 Yeaa but we should expect the efficiency to improve over the years and decades.

[@glenwaldrop8166]

The main benefit I've found from wireless charging is that the micro USB connector is not as hardy as the mini USB and you have less wear on your cable and phone.

[@bendgk123]

not an issue for lightning or usb-c

[@bendgk123]

this is simply a shortcoming of micro

[@MrSamdabeast]

I would argue current wireless charging is less convenient than a wire. You can't use your phone while it's charging wirelessly

[@TheHispanicUsername]

Fr this sucks for us gamers but for normies its fine

[@AsbestosMuffins]

wireless solar battery, the most inefficient means to charge one's phone

[@DadBodDrumming]

until its cloudy. Then its useless

[@brandonb9452]

Chad Sanborn no.. solar panels still work when there’s little or no visible light

[@jeffreyhuang3814]

3:58 If you construct your own transmission coil you can wind the coils around the entire room by placing the wires behind the baseboard. Obviously, you need to know what you are doing or else you will electrocute yourself/start a fire. But if the operation works, you can charge the device anywhere in the room. In fact, the size of the magnetic field will allow you to receive partial charge from outside the room and from adjacent floors.

[@blaineporter4966]

That was exactly what Tesla did in a couple of his experiments. He adapted small coils to power incandescent bulbs in his laboratory but wrapped coils around the perimeter. He understood from the beginning that it was a near-field technology, so his vision (at least for this type of power transfer) was that every home would have coils built in to light the room with no need to string wires anywhere else :]

[@milanr3129]

Not true, at the edge of the room the phone will only barely charge due to the loss of flux and near the pole you would just fry the internals of your phone due to the great amount off flux needed to keep the entire room in the magnetic field, there is a reason why transformators use laminated cores instead of just air

[@gullit97]

Nice video as always, BUT! There's one major thing that's bugging me as i was very intrested in the problem of efficiency. You did not say what the efficiency of a traditional charger is! Without a reference or comparison numbers are completely meaningless. I don't know how bad it is compared to what we have now, and that is the relevant question. Cheers!

[@gnautist]

The efficiency loss measured in that study was only that of the wireless transmission device, not how well it charged off of that. In this case the efficiency of a "traditional charger" (copper touching copper) would be basically 100% comparatively. The efficiency of how well the charge circuit say on the phone accepts power from either device would be the same.

[@gullit97]

Mike Davidson Thanks! That's the kind of info i wanted.

[@nipunagunarathne4882]

conventional chargers are between 70 to 80%. Some good brands reach just over 80.

[@woo9914]

Nipuna Gunarathne that’s the efficiency of the charging circuit, not the wire itself. This circuit would have to be on the wireless charger as well.

[@nipunagunarathne4882]

Woo 991 the loss in the wire is negligible. Around 1%. Which means 99% efficiency. I did the calculations. Besides. That's a biased way to do the comparison. It gives the wrong idea. It's like saying "car A does more miles per gallon than car B" but it turns out you have to run car A with the AC on because it gets hotter inside than car B which makes the mpg gain null and void.

[@Elite7555]

I just don't understand why I would ever use such a technology. With my smartphone plugged into my PC with a reasonably long USB-cable I can charge and operate it at the same time. It's like magic! And it is fully charged in under an hour. Now with electric vehicles I might be able to understand the benefits. Although, not really. Any kind of efficiency loss means longer charging time and higher electricity bills. And this is quite significant for operating an electric vehicle. It is no great inconvenience to just plug it in. Now, I understand that in public places chargers can easily get damaged or some funny dude just unplugs your car. But I just don't think one would regularly charge one's car in a public parking spot.

[@Pete856]

Once upon a time phone batteries struggled to last all day, so you would buy a spare that you could swap out in seconds. Then phones got better battery technology and lower power usage, you could now go a week between charges, so you didn't need a spare battery. Then smart phones came along and we've go backward ever since :) BTW, I don't want high frequency magnetic fields all that close to me, wouldn't buy a car that used it.

[@scinary7052]

" high frequency magnetic fields" You better get rid of your internet then, that's a high frequency electromagnetic field too.

[@Rebius]

magnetic fields don't have frequencies, they have flux

[@Pete856]

@@Rebius Yes, magnetic fields are measured in flux, BUT when those fields are generated by alternating current, they have an electromagnetic frequency too.

[@Rebius]

@@Pete856 sure, but were are not talking about AC, batteries need DC, therefore there is no oscillating magnetic field while wirelessly charging batteries.

[@Pete856]

@@Rebius How do you think wireless chargers work? Wireless (or induction) requires AC to generate alternating field lines in the primary which is picked up in the secondary coil, the faster this alternates the more electricity that can be generated in a given area. The battery pack is charged from the secondary coil which picks up the alternating magnetic flux which causes electrons to flow, generating AC. This AC is then converted to DC using a rectifier and feed into the battery.

[@gsmiro]

The root problem of all electrical devises is that the electricity has to be generated from somewhere and transmitted through long distances. Unless every house has its own solar panels system that can generate enough power for daily usage and charges EV, the push to EV will collapse the current grid.

[@wailfaridi2070]

This is more like the history of wireless charging rather than the truth

[@Rebius]

it's both ;)

[@gabrielwilliams6373]

Don't you mean wireless CHEEEEERGING?

[@motaat7643]

Gabriel Williams jony ive

[@Berbs73]

Who cares how people pronounce words? You know wtf he means.

[@powderedwater4742]

@@Berbs73 someones sensitive and hates jokes. im sure RE would laugh at this comment lol

[@neehgurg2111]

Wireless cherging ker

[@uvuvwevwevwevossasmaster3819]

6:00 he says tesla model 3 but it says tesla model s

[@xxXthekevXxx]

Uvuvwevwevwe Onyetenyevwe Ugwmuhwem Osas He said he means Model S in comments

[@andrewpaulhart]

Forget about the wider issue of adding more grid capacity. The biggest problem for adoption of wireless charging for cars is that it doubles the cost of charging your car. With increasingly fast rapid charging that’s a trade off that becomes less and less attractive. For phones, I imagine that wireless charging is slower than charging by cable. Personally I would always prefer a fast charging USB port to be available instead of a wireless pad. Of course there is the slight issue of having to carry a cable with you, but I’d much prefer phone manufacturers to standardise on a single type of usb power connector, then cafes could provide us with a usb cable instead of a usb socket.