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Haier Plans To Embed Area Wireless Chargers In Home Appliances

Lucas123 writes Haier has signed a development agreement with Energous, a maker of the WattUp wireless charging router. Haier plans incorporate the technology in appliances allowing enabled mobile devices and wearables to take a charge at up 15 feet away. The white goods maker is expected to come out with the enabled appliances in the next 14 months or so. The WattUp router uses radio frequency (RF) transmissions to send up to 4 watts of power in a 15-ft. radius. Within 5 feet of a WattUp wireless router, a mobile device can be charged at the same rate as if it were plugged into a wall socket, but as the distance increase the charging capability dissipates. For example, at a range of 5-to-10 feet, charging capability drops to 2 watts per device and at 10-to-15 feet, the router puts out 1 watt per device (4 watts total). Pleasanton, Calif.-based Energous raised nearly $25 million when it went public earlier this year. Its chief marketing officer said the company has joint development agreements in the works with battery makers, smartphone sleeve and wearable device manufacturers. Haier hasn't disclosed what products it plans to enable with wireless charging.

61 comments

  1. Wireless charging? by chinton · · Score: 2

    I hope it isn't the same one used by Daystrom...

    1. Re:Wireless charging? by 93+Escort+Wagon · · Score: 1

      Don't worry - all the bugs got worked out in the first four prototypes. The fifth one is golden!

      --
      #DeleteChrome
  2. Sounds wasteful and stupid ... by gstoddart · · Score: 4, Insightful

    So, I might have my fridge and my freezer and my washing machine emitting power on the off-beat chance that a device is nearby which needs it? Am I going to be using more power to broadcast it when it's not needed? If so, this is incredibly stupid.

    Yay! Let's all spent more for our appliances and pay higher electrical bills so that our fridge could be standing by to charge our cell phones.

    Is a frigging charger that had to navigate that we need out fscking applilances just beaming power just in case?

    I'm sorry, but the entire idea of this sounds pretty stupid to me.

    Oh, but it's fridge 3.0, it's supposed to be connected to the interweb and be a hotspot for my @%$^$# phone. I don't see much value in this product for me.

    Now get off my fscking lawn, you kids and your dancy do-dads and whirly-mahoozitzes. This is just technology for the sake of it.

    --
    Lost at C:>. Found at C.
    1. Re:Sounds wasteful and stupid ... by CreatureComfort · · Score: 4, Interesting

      How about having your can opener/coffee maker/etc. with a battery to wirelessly charge and not have to have cords all across your counters? How about LED under counter lights that don't need cords, or electric plugs?

      I can think of a dozen good uses for this. Now whether it's worth the end cost is a debatable subject.

      Ideally, the charge transmitter and charge receiver should have a built in short range communications path, and the transmitter would only turn on when it received a request, and then would turn off once the receiver indicated it was full.

      --
      "Unheard of means only it's undreamed of yet,
      Impossible means not yet done." ~~ Julia Ecklar
    2. Re:Sounds wasteful and stupid ... by Anonymous Coward · · Score: 1

      Yep. When I want a washing machine, I want a washing machine... a device that washes/rinses/spins clothes dry. I don't want a wireless charging appratus (which wastes energy.) I don't want another trivial-to-hack Internet enabled device [1], nor do I want to be microwaved (I rather not have cataracts.) If I want a charger, I can pay some cash and get one that goes on a special circuit in my house which powered from a couple AGM batteries so low-drain devices are not hitting my electric bill.

      To boot, wireless chargers are expensive and inefficient. A lot winds up wasted as heat or otherwise lost, similar to car exhaust. It is a lot better to just plop a device in a stand or hook up a cable.

      [1]: Just have it keep filling up water until the house is flooded right after the occupants leave would do a lot of damage. If you think there will be actual security on this device, then I have a driving route from I-10 to H-1 for you.

    3. Re:Sounds wasteful and stupid ... by eightball · · Score: 1

      In theory, it could send out low-power pulses and check for reflections from antennas, then only go to full power if there is a nearby device that could use it.

    4. Re:Sounds wasteful and stupid ... by Anonymous Coward · · Score: 0

      Dude, I heat and reheat 80 gallons of water 24/7/365 in the offhand chance that I might want to do laundry, dishes, or take a shower (hint: I don't). And where I live that electricity is generated by 100% renewable waste-to-energy incinerators (lots of heavy metals and 20% more CO2 than burning coal). So I say, let the kids charge up their faceboxes while they stand in the light of an open fridge door. It ain't like it's going to hurt anything.

    5. Re:Sounds wasteful and stupid ... by gstoddart · · Score: 1

      I can only imagine how terrible of an experience it would be to talk with you about an idea that I was excited about.

      So, I'll just keep my idea for an under-the-chin shaving kit to myself.

      I don't hate technology merely because it's technology. I hate it when it's pointlessly complicated just because it's technology so some company made up of marketing clowns can use buzzwords to sell a pointless product.

      So, if your under-the-chin shaving kit has a GPS, shortwave radio, blinking LED lights, and also functions as a wi-fi hotspot? It's a dumb fscking product.

      --
      Lost at C:>. Found at C.
    6. Re:Sounds wasteful and stupid ... by camelrider · · Score: 1

      ...and dangerous. Especially in public places. How does this RF radiation affect things like pacemakers.

    7. Re:Sounds wasteful and stupid ... by hedgemage · · Score: 3, Insightful

      I really want to hear some numbers to inform me how efficient this is. I am not a EE or physicist, so I'm having a hard time seeing how this could be efficient in any way.
      Wouldn't wireless charging in this sense, even if it was initiated by the target device, result in a lot of wasted power? If a transmitter is beaming out power it wouldn't all be 'captured' by a device needing to be charged, would it?
      Isn't this similar to filling a glass of water by setting it on your front lawn and turning on the sprinklers? Yes the glass will fill, but in the process, a lot of water has been broadcast to places where the glass wasn't there to receive it.

    8. Re:Sounds wasteful and stupid ... by Anonymous Coward · · Score: 0

      So, if your under-the-chin shaving kit has a GPS, shortwave radio, blinking LED lights, and also functions as a wi-fi hotspot? It's a dumb fscking product.

      It's web-scale too.

    9. Re:Sounds wasteful and stupid ... by ortholattice · · Score: 1

      This reminds me of my showerhead thermometer. All I wanted was a device to tell me the shower temperature and nothing else. Instead, the only thing I could find were units with all sorts of "features" I didn't want.

      The one I finally bought has a built-in clock for displaying time when not measuring temperature, a temperature alarm system for when the water is too hot, a shower timer, modes for deg-F/deg-C (maybe necessary, but I'd prefer a hidden switch inside the battery compartment to simplify everyday use), and probably other features I never bothered to learn about. So, when I want to use it I have to be very careful to press the buttons in just the right order to invoke the temperature mode (it has to be done each use since it shuts off after 5 minutes to conserve the battery), and if I make a mistake it gets stuck in some setup sequence that's almost impossible to exit from without consulting the manual. I've given up on telling guests how to use it.

      I'd pay considerably more to have a unit that just displays temperature and nothing else, with a single button to turn it on, but it seems such a thing is not available.

    10. Re:Sounds wasteful and stupid ... by Anonymous Coward · · Score: 0

      ...and dangerous. Especially in public places. How does this RF radiation affect things like pacemakers.

      I would expect the answer to that is "not at all." They wouldn't be allowed to release it otherwise.

      The greatest risk would be being sued by some lunatic who believes they're allergic to RF.

    11. Re:Sounds wasteful and stupid ... by mspohr · · Score: 1

      So you make an assumption on how it works (i.e. continuously broadcasting energy) and then go off on a rant.
      First, basic electricity: Continuously broadcasting power without a load (receiver) doesn't waste much power... think of a transformer with no connected load.
      Second, the QI system (and this, also) doesn't broadcast power until there is a load connected. They broadcast a short pulse looking for a load and only broadcast power when the load is connected.
      Third, I'm probably older than you and still not as senile as you appear to be. GOMFL

      --
      I don't read your sig. Why are you reading mine?
    12. Re:Sounds wasteful and stupid ... by AchilleTalon · · Score: 3, Informative

      I don't believe you can run your coffee maker on 4 W, neither your toaster, these appliances are power hungry. Unless you wish to be cooked by your wireless thingy there is no hope to take rid of these power cables in a foreseeable future.

      Average power consumption table

      This thing is good only for smartphones, tablets or slowly recharge a laptop battery. Even LED ligths are starting at 5 W to 60 W. There is a lot of unrealistic expectations here.

      --
      Achille Talon
      Hop!
    13. Re:Sounds wasteful and stupid ... by 93+Escort+Wagon · · Score: 0

      How about having your can opener/coffee maker/etc. with a battery to wirelessly charge and not have to have cords all across your counters?

      Do you have any idea how much power a can opener or (especially) a coffee maker can require under load?

      --
      #DeleteChrome
    14. Re:Sounds wasteful and stupid ... by davester666 · · Score: 1

      coffee maker? not likely, as it would need a fairly hefty battery to work then [as it sucks up 1500-1700W @ 110V for 20min or so]
      can opener? maybe [very short use, but again, needs a battery to provide the power needed]
      permanently fixed lights? stupid.

      But the real thing is that it is inherently inefficient. It's like running the hot water tap 24/7 just a little because you hate waiting for it to get hot.

      --
      Sleep your way to a whiter smile...date a dentist!
    15. Re:Sounds wasteful and stupid ... by Anonymous Coward · · Score: 0

      Apparently you didn't read the "with a battery" part.

    16. Re:Sounds wasteful and stupid ... by Mikkeles · · Score: 1

      Drill a hole in the pipe to the showerhead and glue in a digital fever thermometer. On, off, and the right range for a shower!

      Or, adhere one of those thermometer strips available for home brewing and wine-making.

      --
      Great minds think alike; fools seldom differ.
    17. Re:Sounds wasteful and stupid ... by AchilleTalon · · Score: 2

      The transformer/load analogy does not hold water. This is not a closed electrical circuit, you are radiating energy in space via radiowaves. Hence, you are dissipating energy whether or not there is an antenna to pick the signal. If the emitted signal is omni-directional, you are likely to waste much energy while charging you gizmo if you want a 4W signal at 15 ft.

      There is a lot of bullshit around the wireless power transmission. I even met people thinking they could transmit electricity Africa wide without a single copper wire, just by wireless transmission. They believe this could replace the electrical grid for power distribution. They simply have no idea how much power will be wasted that way and how many people will be microwaved in the process. If today's radio signals are harmless, it is only because the power transmitted is insignificant and the original signal is recovered and reconstructed using wonderful signal processing tricks.

      --
      Achille Talon
      Hop!
    18. Re:Sounds wasteful and stupid ... by Anonymous Coward · · Score: 0

      Sure... and you can cook food on the counter next to your fridge. Your guts as well.
      No thanks. I have enough EMI in my house. Why don't people just use drop in chargers for there toys. Oh thats right that would make too much sense and they can't sell you another charger because that last one broke it's cord/connector/capacitor. Or even a new cell phone because the connector is trashed. I'm sick of it. I'm going back to handhelds (GMRS,HAM,etc) for my local coms. Now if only the fcc would allow scrambling. They all come with drop in chargers. Now to find a drop in for my car.

    19. Re:Sounds wasteful and stupid ... by azadrozny · · Score: 1

      I think the article eluded to this, that there would be some communication between the device and router before the charging began. I am a bit skeptical about putting this into large appliances like the fridge, however putting this into the base of a desk lamp might work well. That being said it would probably just be better mounted on the wall, or better yet, inside the wall out of view, hardwired into house power.

    20. Re:Sounds wasteful and stupid ... by Anonymous Coward · · Score: 0

      The transformer/load analogy does not hold water.

      It's not an analogy. A transformer is literally a short range version of this device.

    21. Re:Sounds wasteful and stupid ... by Anonymous Coward · · Score: 0

      There are nice shower& Faucet heads that use mini generators and leds to tell the temp of the water and tell you what the temp is by what color is displayed on the leds changing the water color.

      (This is ideal for kids), but it might be worth checking out for you too.... especially the no external power part is really nice.
      http://www.amazon.com/Best-Shower-Head-Color-Changing/dp/B00NX11TAS/ I haven't bought any of them, or know if there is better that aren't on amazon... but might be worth experimenting.

    22. Re:Sounds wasteful and stupid ... by Jarik+C-Bol · · Score: 1

      Yeah, you cant run any of those things directly, which is why its "Wireless Charger" not "Wireless Power".
      Sure, the toaster and coffee maker is a poor example, but a string of LED lights that is not on 24/7 could easily have a battery that could run them for several hours, and be topped off by the wireless charger while turned off. (like say, during the 8 or so hours your out of the house) Personally, I would love that, because there is no practical way to route power to where my cabinets are at, and under cabinet lighting is awesome.

      Plenty of people would like having their smartphone charge by leaving it on their table near the fridge, and the same tech could be added to things like busses, cabs, and trains and rolled into the fare, so your phone gets topped off while you commute.

      There are several other household items that need power that could easily charge as well, such as Wall clocks, alarm clocks, digital thermometers, small weather stations, Smoke detectors and whatnot. Never needing to replace the batteries in those things, while trivial, is also the sort of thing that people would buy, because we are slaves to convenience.

      --
      I've decided to Diversify my Holdings. I've divided my cash between my left and right pockets, instead of all in one.
    23. Re:Sounds wasteful and stupid ... by Anonymous Coward · · Score: 0

      Is your finger miscalibrated?

    24. Re:Sounds wasteful and stupid ... by MattskEE · · Score: 1

      If power is transmitted using near-field methods such as the direct inductive coupling used in RFID, most cell phone wireless chargers, and electric toothbrush chargers then the power transmission is coupled directly to the recipient device, and if the device is removed and the transmitter is still running then very little power is radiated away. This is potentially quite efficient. If you use far-field transmission then power is being radiated away whether a device is there to receive it or not. In order for it to be efficient you need high antenna gains to focus the power into a narrow beam the size of your receiver antenna aperture and beamforming to actively steer it. Otherwise the antenna is just spraying a broad beam of power in the general direction of the receiver like your sprinkler analogy.

      They say it's using far-field transmission of power:

      WattUp's RF transmission, which operates at 5.7MHz and 5.8MHz, is referred to in the industry as "far-field" wireless charging. Energous is not the first company to come up with the idea.

      At such low frequencies it would be very hard for them to implement high gain antennas and beam forming. Also at such low frequencies I wonder how it can really be far field since the receiver will be well within a quarter wavelength of the transmitter.

      More information is needed to fully answer the question, but this sounds like a convenience feature rather than an efficient one.

    25. Re:Sounds wasteful and stupid ... by MattskEE · · Score: 1

      They claim to use far-field power transmission (i.e. radiated power) rather than near field inductive coupling. The transformer analogy only works for near-field transmission but it tends to be difficult to get range. Far-field will be radiating power all over the place.

    26. Re:Sounds wasteful and stupid ... by kesuki · · Score: 1

      if from 5 feet away a device will charge up 4 watts... and that equals 152 cm radius... and we assume device is 1 cubic centimeter then. 152Ã--2Ã--3.14Ã--4=3818.24 watts because the device uses an omnidirectional antenna (i assume as gps forwarded directional masers fine microwave lasers aren't being used) is more expensive and can no longer charge all devices in range. of course a projected cylindrical formed antenna drops power use in half, but still 2000 watts to drive a 4 watt device cause you're too drunk to charge your phone is crazy.

      this is energy use to end civilization. can you imagine if 7 billion humans used 30billion always on 4000 watt omnidirectional wireless power? even if we all used LFTR(thorium) would be hard to come by, and the frequency the devices operate on would be uterly useless for anyone. but yeah we could all wear ambient LED safety lights in all the malls until cancer killed everyone.

    27. Re:Sounds wasteful and stupid ... by kesuki · · Score: 1

      i see that the multiply signs got garbled. 152 cm x 2 x 3.14 x 4 watts = 3818.24 watts. i think i made a mistake and it really needs a second 3.14 multiply to make it spherical instead someone correct my maths if possible. this is why wireless energy never took off.

    28. Re:Sounds wasteful and stupid ... by kesuki · · Score: 1

      i checked a few sources and got the math right. the surface area of an omnidirectioanl transmission sphere (like old radio towers prior to directional antennas that literaly half the power consumption) is 4 times pi times radius times radius. which means 4 watts at 152 cm assuming a 1 square cm rectenna is some 290,333 square cm or 1,161,332 watts assuming that all the math is right only google helped me and i wasn't sure if i needed to square root the surface area to get square cms or not. in case i did it is then 1077 X 4 watts or 4300 watts at five feet... which is way more sense that the first one, but then the first one would power some 23104 items instead of 1077 devices, again assuming omnidirectional transmission. 4 90degree directional antennas use half the power in either case. since they don't radiate up or down as much. also only 1/4 of the antennas need to be on if all devices are withing a single 90degree directionals... however a multi axis narrow directional beam a single square cm in size uses 1/1,077th or 1/23104th of the power at the caveat of only being able to charge one stationary non vibrating device per directed energy beam aparatus. all this assumes 100% effeciency when realistically more like 75% to 23% efficiency depending on distance etc. things plug into wires for a reason.

  3. bath in microwaves by Anonymous Coward · · Score: 1

    Given the very limited ranges, they have to be talking about microwaves.

    Gee, everybody, put your hands up if, like me, your router is within 3 feet of where you sit! Good, you'll now be bathed with a MUCH higher power level of microwaves.

    And think of the growing health benefits. Why, you'll feel "charged up" yourself. No more need for those 5 hour energy drinks!

    I look forward to putting a hot dog onto my router, so I can eat lunch without having to leave my desk. And think of the popcorn I can make while at my desk!

    1. Re:bath in microwaves by MPBoulton · · Score: 1

      Given the very limited ranges, they have to be talking about microwaves.

      Gee, everybody, put your hands up if, like me, your router is within 3 feet of where you sit! Good, you'll now be bathed with a MUCH higher power level of microwaves.

      And think of the growing health benefits. Why, you'll feel "charged up" yourself. No more need for those 5 hour energy drinks!

      I look forward to putting a hot dog onto my router, so I can eat lunch without having to leave my desk. And think of the popcorn I can make while at my desk!

      Don't forget your never-goes-cold coffee

    2. Re:bath in microwaves by gstoddart · · Score: 1

      Don't forget your never-goes-cold coffee

      And, as an added benefit, we might give evolution a kick start into our next phase of existence.

      I've always felt we could use an least one more limb.

      --
      Lost at C:>. Found at C.
  4. i can see this going south in a hurry. by nimbius · · Score: 1

    reviewer 1: works well to charge ipad, cellphone, and ensure carkeys glow cherry red.
    reviewer 2: dresser charges cellphone quickly, washing machine bricks laptops in a jiffy
    reviewer 3: washing machine wiped credit cards and screwed up my bluetooth carkey. Excellent feature to ensure laundry gets done.

    --
    Good people go to bed earlier.
    1. Re:i can see this going south in a hurry. by 93+Escort+Wagon · · Score: 1

      reviewer 3: washing machine wiped credit cards and screwed up my bluetooth carkey. Excellent feature to ensure laundry gets done.

      To be fair, a washing machine can already do this. You just have to forget to take the key out of your pocket when you do laundry.

      --
      #DeleteChrome
  5. You should all go buy some RIGHT NOW by Medievalist · · Score: 1

    Wireless charging schemes are totally awesome, because I am heavily invested in Texas and Arab Oil.

    If you are a non-billionaire, remember profligate waste is super patriotic, and be sure to do your part! For AMERICA! (Or for the heathen foreign ideals of your benighted snail-eating nation, should you not be American.)

    If you're a billionaire, I'll see you at the club later. Today we're using Tea Party congressmen as ponies for the polo match, and later we're having naked petroleum jelly wrestling featuring network anchor-babes. It'll be great!

    1. Re:You should all go buy some RIGHT NOW by istartedi · · Score: 1

      LOL, could not have said better myself.

      --
      For all intensive purposes, "whom" is no longer a word. That begs the question, "who cares"?
    2. Re:You should all go buy some RIGHT NOW by Dragonslicer · · Score: 0

      This post is even better if you imagine it being read by Stephen Colbert.

  6. 4W...!? by Anonymous Coward · · Score: 0

    just what i want, a bunch of 2-4W intentional RF transmitters scattered throughout my house. wonder what frequency these operate at?

  7. Location, location, location by tomhath · · Score: 1

    Wouldn't it be more cost effective to build your house underneath a high voltage power line?

  8. Hmmm by koan · · Score: 1

    Seems like a bad idea, for health reasons and various other reasons.

    Will just have to wait and see.

    --
    "If any question why we died, Tell them because our fathers lied."
    1. Re:Hmmm by Nethemas+the+Great · · Score: 2

      There's no need to wait and see. This idea is foo'd up for all the same reasons that HAM radio operators have a statistically significant higher incident of cancer. Why everyone is racing to drop the broadcast power of cellphones. And, why putting your head in the microwave is generally considered a bad idea.

      Are you going glow green, set off radiation detectors at airports, or erupt in blisters and boils? No, but just because it isn't ionizing radiation doesn't mean its harmless.

      --
      Two of my imaginary friends reproduced once ... with negative results.
    2. Re:Hmmm by Anonymous Coward · · Score: 0

      HAM Radio guys are doing because of the fact the they use all kinds of chemicals in the projects they build. RF has very little if any to do with it. Ever "relesed" the Magic Smoke for a chip and got a whiff of it. There's your cancer; right up your nose. Enjoy.

    3. Re:Hmmm by hankwang · · Score: 1

      "HAM radio operators have a statistically significant higher incident of cancer."

      You seem to be selective in your interpretation of the data. From the second link:

      "Among men, there were 14,630 deaths (SMR = 0.73 (95% CI = 0.71-0.74)) and among women, 760 (SMR = 0.72 (0.67-0.78)). There were 4,007 cancer deaths among males (SMR = 0.79 (0.76-0.81)) and 289 among females (SMR = 0.82 (0.72-0.92))."

      Standardized mortality ratios (SMR) smaller than one for cancer mean that there are fewer cancer deaths among radio operators than among the total (US) population. The abstract continues to state that for some particular types of cancer, the SMR is slightly above one, but with very wide confidence intervals (CI), which indicate that there are too few cases for reliable statistics.

  9. Power Waste by MrTester · · Score: 1

    Everyone is assuming that these things will just sit there spewing out power 24/7, but I have to believe that we can figure out some sort of handshake so that these are only throwing out power when there is a valid device within range.
    It doesn't say anything about that in the article, which seems odd, but I think we are only talking about the power loss from inefficient transfer (which is not insignificant), not continuous output.

    Can anyone confirm?

    1. Re:Power Waste by mdm-adph · · Score: 1

      It does speak about the handshake that goes on in the video, before charging takes place: http://www.computerworld.com/a...

      --
      It is by my will alone my thoughts acquire motion; it is by the juice of the coffee bean that the thoughts acquire speed
  10. Waste of Power by Anonymous Coward · · Score: 0

    From the Article: "On average, 40% of the electricity sent from a utility's grid into a home is wasted as it moves through various transformers. That loss is greater with wireless charging systems."

    If we don't get that number down to 20% with these chargers, I wont be happy.

  11. Microwaves? by koan · · Score: 1

    https://en.wikipedia.org/wiki/...

    Is this how it will work?
    Does it pop corn too?

    --
    "If any question why we died, Tell them because our fathers lied."
  12. Sounds wasteful and stupid ... by friedmud · · Score: 1

    Maybe not in the home... but think about public spaces. Put a few of these in a hotel lobby and everyone traveling through there can get a charge.

    What about at Airports? Put one in the middle of each waiting area and all the passengers get a charge.

    How about meeting rooms at companies?

    Not too mention restaurants (Starbucks?)...

    There are tons of places where lots of people congregate and they would appreciate getting a "top up" on the their batteries.

    This is not a question of "if" only of "when"... and these are the first steps toward that...

  13. Hahaha. No. by sandbagger · · Score: 1

    You have got to be kidding. What idiot MBA thought this idea up.

    What practical use case does it solve for the end user that a better antenna on the main router wouldn't solve?

    --
    ---- The above post was generated by the Turing Institute. Maybe.
  14. Airports should adopt this immediately by timeOday · · Score: 1
    Refrigerators aside, wireless charging within a 15 foot radius would be most welcome at the gates in airports, for example on the pillars between rows of seats. Usually there are too few outlets and a big tangle of wires strewn across walkways because everybody needs to recharge their stuff!

    The other extremely useful place for this would be in your car - the family is rolling down the road with about half a dozen tablets etc, all getting charged. Most people are in their car often enough that they'd never have to worry about charging again.

    1. Re:Airports should adopt this immediately by waspleg · · Score: 1

      Need.... That's the problem. People don't know what that word means anymore.

  15. 4 watts isn't enough by MobyDisk · · Score: 1

    The WattUp router uses radio frequency (RF) transmissions to send up to 4 watts of power i..a mobile device can be charged at the same rate as if it were plugged into a wall socket

    What is truly amazing here is that this 4W charger can charge devices at the same rate as my 5 and 10 watt chargers! The last generation of phones use 5V 1A = 5 watt chargers, while new phones and tablets use 5V 2A = 10 watt chargers. So no, this 4 watt device won't charge them at the same rate.

    1. Re:4 watts isn't enough by hankwang · · Score: 1

      "4W charger can charge devices at the same rate as my 5 and 10 watt chargers! The last generation of phones use 5V 1A = 5 watt chargers"

      That the charger is capable of delivering 5 W does not actually mean that the device will actually draw that amount. I have a dongle that measures the current and voltage of USB chargers and my smartphones rarely draw more than 0.8 A, and even then only if I use a low-resistance cable with a battery below 80%. Cables that are long enough to reach comfortably from the floor to my hands while I'm sitting usually do less than that.

      Google "usb charger doctor", the dongle is only $7 or so.

  16. Are we talking about the same Haier here? by tibit · · Score: 1

    For some reason I thought that Haier was the typical race-to-the-bottom appliance manufacturer that peddles short-lived, underengineered crap. I expect that the UX of this "innovation" will be a trainwreck. Why is this news?

    --
    A successful API design takes a mixture of software design and pedagogy.
  17. Roughly 16 watts radiated per 'charger' by Anonymous Coward · · Score: 2, Insightful

    At 4 watts delivered to up to 4 devices at the same time, there has to be at least 16 watts radiated power. At the specified frequency of 5.6-5.8 MHz, or a wavelength of about 52 meters, devices charging at the full 4 watt rate are within 5 feet or 1.5 meters, or about 3% of a wavelength. This is a near-field coupled RF system, so it behaves a bit like a transformer. The efficiency will be very sensitive to relative orientation of the charger and load, and to proximity of other large metal objects, especially ones that are 1/4 wavelength multiples (13 meters). With luck, they might see 50-80% efficiency. Use in a multi-story steel frame building will be interesting.

    The transmitter and receiver will almost certainly be using resonant loop antennas, which again act like the primary and secondary of a transformer. It may be possible to run the transmitter at a reduced power until it sees a load appear when a receiver's loop antenna is in it's near field. This could be fooled by that steel frame building into delivering full power continuously to slightly warm the structure. A more reliable system would use two-way communication between the charger and load, at the expense of considerably more complex circuitry. Some of the docs from Energious mention Bluetooth, so they may be using a Bluetooth link to initiate and arbitrate the charging operation.

    At 52 meters, the wavelength is much too long to interact with a human, so I'm not worried about medical effects. I am concerned about the potential for radio frequency interference, as each of these chargers will represent a 16 watt shortwave transmitter build without much regard to signal quality. As an amateur radio operator, I know that at these frequencies and power levels, I can throw a radio signal hundreds to thousands of miles. The thought of a few hundred thousand refrigerators and microwaves all busily transmitting, with harmonics and intermodulation effects spreading their signal across the radio spectrum seems like a perfect formula for massive radio communications interference.

  18. Haier? by Anonymous Coward · · Score: 0

    I never really thought their appliances were all that good. Had 2 of them in the house I bought in 2007 (brand new for the owner to not show a "naked" kitchen. The Fridge died in less than 2 years (door never stayed closed, and yes, it was level and plumb) and the dishwasher leaked from the very first use. (guessing the gasket didn't last in a house that was not occupied for 2 years before I bought it)

    I haven't bothered to check Consumer Reports, but when I think of quality appliance brands, Haier is not a name that comes in the top 10...