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Technology Science

Using Air to Recharge Your Cell Phone 346

Posted by CmdrTaco from the finally-a-use-for-my-wind-pipe dept.
sanspeak writes "Now you do not have to look for a power outlet to charge your cell phones. Department of Industrial Design at Indian Institute of Technology, Delhi have come up with a mobile turbine which generates around 3 to 4 watts of energy - sufficient to charge a mobile phone. It costs around $4, fits in your pocket and runs on air ;-). What else do you want ?"
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Using Air to Recharge Your Cell Phone More

Using Air to Recharge Your Cell Phone

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  • You're going to WHAT?!?! (Score:5, Funny)

    by ackthpt ( 218170 ) * on Thursday February 24, 2005 @03:01PM (#11769598) Homepage Journal
    ... a mobile turbine which generates around 3 to 4 watts of energy - sufficient to charge a mobile phone. It costs around $4, fits in your pocket and runs on air ;-). What else do you want ?"

    First impression of "in your pocket and runs on air" is this is charged by hydrocarbon emissions, i.e.

    I am not "just" farting, I'm recharging my phone, and it's a renewable resource!"
    Logically followed by
    "Now you're going to hold that thing to your face?!?!"
    The device is best suited for coastal areas where the wind flows almost continuously.

    They must eat more lentils there...

    "ahhhhh, go blow yer phone!"

    • With that wink strategically placed in the story description, this is the first thought that came to my mind, too.

      That said, I have some friends who could probably run their phone just with the volume and amount of time they spend talking into the darn thing ...

    • Re:You're going to WHAT?!?! (Score:5, Funny)

      by mmaddox ( 155681 ) <.moc.liamg. .ta. .oofpoo.> on Thursday February 24, 2005 @03:07PM (#11769701)
      Run, Tommy! Run like the wind! ...Can you hear me now?

      • yeeeeeeehaw (Score:5, Funny)

        by Anonymous Coward on Thursday February 24, 2005 @03:25PM (#11769914)
        That was really funny. It would be good for people who run in rodeos and then go home and ranch their cattle because there is a lot of wind on the praire and they would be riding around on horses, which is a lot of fun.

        The wind would blow, and then the battery would get really recharged. They could talk forever:
        Sample conversation

        Customer service: This is a Sprint customer service person, how may help you?

        Cowboy Neal: I would like to order some pizza
        ?

        Customer service: This is not a pizza place, this is Sprint Customer service

        Cowboy Neal: Oh, sorry, I just pressed some random buttoms because my battery is really charged up.

        Customer service: Oh you have one of those new air chargers, those are really cool

        Neal: Yeah, I like them a lot.

        Sprint customer service: Hey have you played Zelda: The wind waker?

        Cow Boy Neal: I hear it is awesome.

        Sprint person: Can you hear me now.

        Cow Boy Neal: Yes.

  • Alternatives (Score:5, Insightful)

    by fembots ( 753724 ) on Thursday February 24, 2005 @03:01PM (#11769606) Homepage
    Why not use Faraday's Principle of Induction like these LED torches [thinkgeek.com] or a windup charger [cellular.co.za]? Both are independent of external factors.

    Hanging out your phone from a car, bus or (shock!) train is pretty dangerous stuff, maybe superman will find this thing handy.

    I hope they haven't patented this technology yet, 'cos I'm rolling out my air-powered fan next month.

    • Re:Alternatives (Score:5, Funny)

      by antifoidulus ( 807088 ) on Thursday February 24, 2005 @03:10PM (#11769743) Homepage Journal
      air-powered fan next month.
      Powered exclusively by /. comments!
    • Hows about attaching it to the air vent inside your car? Mount your cellphone to it and you have a portable cellphone charger without the need to hang your $100 phone out the window.

    • RTFA (Score:3, Informative)

      by Short Circuit ( 52384 ) *
      They're not talking about hanging the things out of car windows. A 12V adapter would be better for that, anyway.

      Instead, they're expecting that typical environmental wind, especially that found on coasts, will work well enough. The idea is to ease communications access to areas without convenient electricity. (Mountain climbing, anyone?)

      • Re:RTFA (Score:3, Funny)

        by Anonymous Coward
        Err... why would hanging a 12V adapter out of a car window be better? I don't quite get that.

    • Re:Alternatives (Score:3, Interesting)

      by SCHecklerX ( 229973 )
      Or wind up radios. My dad has one, and it runs for quite some time on a few cranks.

      http://windupradio.com/ [windupradio.com]

    • Re:Alternatives (Score:3, Interesting)

      by the pickle ( 261584 )
      Why not use Faraday's Principle of Induction like these LED torches

      Because I've used one of those, and they royally suck. The light is nearly worthless. I blame this on their reliance on an ultracapacitor rather than rechargeable batteries. Batteries would enable the use of more LEDs, making the light a lot more useful. Nothing wrong with Faraday induction, just that's a HORRID example of it.

      Also, doing this in a fone would require substantial empty space and weight, neither of which seems to be all that

  • Blow or run really fast (Score:5, Interesting)

    by nizo ( 81281 ) * on Thursday February 24, 2005 @03:01PM (#11769608) Homepage Journal
    I can't wait to see people blowing into their phones before they make a call, unless they do what the article recommends:
    The device will help mobile phone users charge their phones while travelling in a bus, a car or a train. All they need to do is -- place the turbine against the wind flow.
    In other words, hold it out the window. Can they get sued when people drop their phones, or lose an arm while holding it out the window?
    • Can they get sued when people drop their phones, or lose an arm while holding it out the window?

      You must be out of your mind.
    • they didn't mean for you to stick your hand out

      remember, this is designed in india, where windows are almost always open, or you are in an open rickshaw (enough wind!).

      sticking your hand out there (in that case, anywhere in a car) is very dangerous, and i'm guessing no, you can't sue them.

    • Re:Blow or run really fast (Score:5, Funny)

      by Anonymous Coward on Thursday February 24, 2005 @03:08PM (#11769712)
      But that's stealing energy that rightfully belongs to the train operators.
    • Can they get sued when people drop their phones, or lose an arm while holding it out the window?

      Only if it's because you're riding with an evil driver who rolls up the window on you.

    • You've obviously not seen (Score:5, Funny)

      by donutello ( 88309 ) on Thursday February 24, 2005 @03:17PM (#11769816) Homepage
      ... how people travel [sumgenius.com.au] in [waxvisual.com] India.
    • The device will help mobile phone users charge their phones while travelling in a bus, a car or a train. All they need to do is -- place the turbine against the wind flow.

      So if I need to charge my phone, I can drive my 12 MPG SUV around town and hang this turbine out the window?

      Cool! That is such a leap forward.
    • Of course you don't really get any cost saving when sticking it out the window in your own car. The increased air resistance means the cars engine needs to burn more fuel to maintain the same speed, just so your wind turbine can convert that energy into electricity.

      It would be easier (and probably more efficient) just to plug the phone into the cigarette lighter adapter.

      You'd be better off relying on weather-related wind (or just run really fast, thus powering your phone by biomass).

  • No air indoors (Score:5, Funny)

    by KinkifyTheNation ( 823618 ) on Thursday February 24, 2005 @03:02PM (#11769613) Journal
    What about us people who never leave the house?

  • What else do you want? (Score:5, Funny)

    by SeanTobin ( 138474 ) * <byrdhuntr@hCHEETAHotmail.com minus cat> on Thursday February 24, 2005 @03:02PM (#11769617)
    Great.. A cell phone that charges by air. Now all I need is a light weight air compressor with an efficiency greater than unity and I'll never have to plug my phone in again! At least, I won't have to plug it into anything aside from the turbine and the perpetual motion machine.

    I still prefer the alternator strapped to a cat with a slice of buttered toast strapped to its back.
    • If you think about it carefully, the buttered toast has to be strapped to the cat's feet ;-)

      • Re:What else do you want? (Score:5, Funny)

        by SeanTobin ( 138474 ) * <byrdhuntr@hCHEETAHotmail.com minus cat> on Thursday February 24, 2005 @04:13PM (#11770497)
        If you think about it carefully, the buttered toast has to be strapped to the cat's feet ;-)
        Not in the "classical" buttered-toast-on-cat scenario. In the classical scenario, a slice of buttered toast it attached to the back of the cat (usually with duct tape) so that the buttered side is facing up if the cat is standing on its feet. When the cat-buttered-toast object is dropped from any height two laws regarding the components come into play. Firstly, a falling cat will always land on its feet. Secondly, a falling piece of buttered toast will always fall buttered-side down. When the cat-buttered-toast object falls, one of the "laws" will be violated assuming the cat-buttered-toast object does indeed hit the ground. Again, in the classical scenario the cat either ends up perpetually spinning above the ground, or simply floats in mid air.

        In your example you are using a non-traditional cat-buttered-toast model in which the cat is placed on top of the buttered toast in such a manner that the cat ends up with buttery paws. This model is not used for various reasons. Firstly, the difficulty of attaching toast to all four paws of the cat is at least an order of magnitude greater than simply attaching the toast to said cats back. Although various attempts at slicing the toast have overcome this difficulty, the amount of effort required is always greater than attaching the toast to the cat's back.

        In any event, the results of the non-traditional model are usually the same as the classical. Our cat with buttery paws is dropped from a height and attempts to land on its feet, however the toast that is attached to its feed attempts to land buttered-side down.

        Now, it should be noted that defenders of the classical scenario usually point out that the toast, relative to the cat, has already succeeded in landing buttered side down by the nature of it being attached to the cats paws. If the cat were to hit the ground while standing on the toast, it would be akin to someone steping on a slice of toast after it has already landed on the floor, buttered side down. Basically it would be irrelevant as the goal of the toast to attach its buttered side to a surface has already been acomplished.

        So, although I used the traditional buttered-toast-on-cat model and the non-traditional models are at least partially flawed, I believe I made the correct decision in its use.
        • DON'T TRY THIS!

          I tried this once on a cat at home (not one of my favorites, fortunately). The cat landed on it's feet at the same time that the bread landed buttered-side down, causing a small tear in space time that instantly pulled the cat, toast, butter container, miscellaneous dishes, the toaster, and 3/4ths of a city block into a parallel dimension where old adages aren't always true. I can't imagine the horror of trying to live in such a place!

        • Re:What else do you want? (Score:4, Insightful)

          by qbwiz ( 87077 ) <john&baumanfamily,com> on Thursday February 24, 2005 @04:33PM (#11770743) Homepage
          What if the cat merely lands on its feet? The buttered toast will never land, and so the complex won't need to hover. That's the advantage of strapping the toast to the cat's feet, if you believe that the toast has not landed when you do so. If it lands, either the unbuttered side of the toast must touch the ground, or the cat's feet must not be down. There is no middle ground where one can land and the other does not, as there was with the previous model.
          • What if we put the cat between two slices of toast? The slice on the cat's feet would be buttered so that the cat's feet were in the butter, and the slice on his back would be buttered so that the cat's back was in the butter. The toast on the cat's feet will orient itself so as to land butter side down, but the cat and the toast on its back will instinctively correct the positioning so that it would land on its feet. The trouble here is that only one slice of toast wants one orientation, while the other

        • Re:What else do you want? (Score:5, Funny)

          by Noofus ( 114264 ) * on Thursday February 24, 2005 @05:48PM (#11771672)
          I attempted this experiment. I tied a piece of buttered toast to my cat's back and dropped him off the side of the table. The cat landed on his feat and the toast slid around his body under the string and hung, butter side down, on his belly. It then slipped out of the string and fell butter side down on the floor.

          Granted my experiment might have been more sound with better method of toast attachment, I do believe this proves that neither law can be violated. Were I to more securely attach the toast some other method of getting both the toast butter side down on the ground and the cat on its feet would present itself ;)

    • Re:What else do you want? (Score:2, Funny)

      by Anonymous Coward
      I still prefer the alternator strapped to a cat with a slice of buttered toast strapped to its back.

      I'm afraid that will infringe upon my hovercraft patent.

  • well, for one thing... (Score:5, Funny)

    by EsbenMoseHansen ( 731150 ) on Thursday February 24, 2005 @03:02PM (#11769618) Homepage
    ...what else do you want

    Does it run linux?

  • uhh... (Score:2, Funny)

    by Arctic Dragon ( 647151 )
    "It costs around $4, fits in your pocket and runs on air"

    Is that a turbine in your pocket or are you just happy to see me?

    • Re:uhh... (Score:5, Funny)

      by Tackhead ( 54550 ) on Thursday February 24, 2005 @03:06PM (#11769687)
      > > "It costs around $4, fits in your pocket and runs on air"
      >
      > Is that a turbine in your pocket or are you just happy to see me?

      From the Department of Industrial Design at Indian Institute of Technology, Delhi.

      I believe you meant to say "Please be telling me is in your pocket a turbine, or are you happy to be seeing me?"

      Now, if you'll pleased to be pardoning me, I have another caller in my queue. Some woman named Paris Hilton needs to be blowing on my hard drive to reboot her Windows.

  • What else do you want ? (Score:5, Funny)

    by davecb ( 6526 ) * <davecb@spamcop.net> on Thursday February 24, 2005 @03:03PM (#11769643) Homepage Journal
    How about an adapter to connect it to my propellor beanie?

    --dave

  • compressed air (Score:5, Interesting)

    by psyklopz ( 412711 ) on Thursday February 24, 2005 @03:04PM (#11769657)
    I once thought that it might be an interesting idea to store compressed air in a tank and then let it out at a controlled rate to run a turbine.

    In essence, the compressed air tank would be a battery (it would 'hold' the energy that was used to pump the compressed air in).

    I don't know a lot of about high pressure tanks. Does anyone know if this would work at all? Would all the air come out too quick to make it worthwhile?

    • Re:compressed air (Score:5, Funny)

      by rd4tech ( 711615 ) * on Thursday February 24, 2005 @03:08PM (#11769716)
      buy a second batery

    • Re:compressed air (Score:3, Interesting)

      by Enigma_Man ( 756516 )
      Anybody who's ever used a pneumatic tool in a shop would probably say it'd work just fine. However, if you've ever seen the size of a tank needed to hold enough air to actually do some work (25 gallons is small) you'd think twice about carrying that around.

      -Jesse

      • Re:compressed air (Score:3, Interesting)

        by psyklopz ( 412711 )
        I was thinking of it on more of a large-scale. Imagine if you were off-grid, and instead of having a row of chemical batteries, you kept a series of compressed air tanks.

        If it would work and provide enough energy, it would also be an environmentally friendly way to store energy for later use.

        Kind of the same idea as pumping water into a tower and then later opening the tower at the bottom and using the flowing water to run a generator. In essence, the water tower is your battery, because it is storing e
        • Sounds great.. but dont forget this thing produces 4 watts.. thats 25x less energy than it takes to run a light bulb.

          So scale it up, even by a factor of 1000x. (Say the turbine is 3" across.) Now its 250ft tall.. you are generating 4000 watts. That will power about 2 houses, maybe 4 if they are all careful.

          Now imagine the airtank to turn a 250ft turbine..

          Doesn't scale very well.

        • Re:compressed air (Score:5, Informative)

          by mmontour ( 2208 ) <mail@mmontour.net> on Thursday February 24, 2005 @03:35PM (#11770020)
          I don't know about individual off-grid use, but this idea has been used commercially. Here's one link [unisci.com].

          There's also a compressed-air car [theaircar.com].
    • airflow isn't the issue; you can regulate the flow at pretty much any level that's suitable. Power density is the important part; in order for it to be a good idea you've got to be able to put more energy into the storage medium than a similar size/weight battery can hold.

      The weight issue isn't that much assuming the turbine is lightweight enough. Size is another issue; but carbon fiber wound air bottles can get 2500 PSI ratings fairly easily so it might be doable...
      • A cave diving buddy used to use spun aluminum 104 cubic foot tanks for just about all of his dives... 3000+ psi. Full weight is about what a steel 50 cubic foot tank weights "empty".

    • Re:compressed air: not efficient (Score:4, Insightful)

      by spectrokid ( 660550 ) on Thursday February 24, 2005 @03:19PM (#11769842) Homepage
      there's this physics law that sais air gets hot when you compress it. If the tank is not insulated it will cool down to room temperature again and you lose quite some energy. There are however examples, there is even a car which runs on compressed air, and in the good old days of steam, they used comp. air locomotives e.g. in ammo factories and other places where you might want to avoid fire.

    • Re:compressed air (Score:3, Informative)

      by cryptochrome ( 303529 )
      Compressed air doesn't hold a lot of energy by weight, you'd be better off buying a battery.

      See more about energy density here [tinaja.com].

      Personally I would think a hand squeezer device like this [thinkgeek.com] would be ideal. It's a very natural motion.

      Compressed air IS useful if you need to deliver a lot of force at once, like with compressed air tools, or if you want to avoid using electrical devices for some reason.

  • What's next? (Score:4, Funny)

    by bigtallmofo ( 695287 ) on Thursday February 24, 2005 @03:04PM (#11769658)
    We've seen hand cranking chargers [edn.com], now windmill charging... How long until someone packages and sells a DIY Dam & Hydroelectric Cell Charging kit?

    Also, I understand that Iran is currently importing plutonium from Russia in an attempt to make a personal, portable nuclear reactor capable of charging cell phones.
  • To see it running in person on a phone that I already own and then have a place where I can order it :)

  • But, (Score:5, Funny)

    by jim_v2000 ( 818799 ) on Thursday February 24, 2005 @03:05PM (#11769662)
    How long does it take to charge, and wouldn't you have to leave it somewehre with a constant air flow? Like, outside, or in front of a fan, or does it strap to your side so it uses the breeze when you walk?

    I can just imagine someone talking and their battery's about to die, and all the other person on the other end hears is "Wait, my phone is dying...hold on a sec *blowing sound* Ok, now where were we..*blowing sound*...Oh yes, about the *blowing sound*..."

  • air vs wind (Score:5, Interesting)

    by Hanzie ( 16075 ) * on Thursday February 24, 2005 @03:05PM (#11769671)
    I think it might be a little more correct to substitute "wind power" for "air" in the writeup.

    Essentially, the idea is to incorporate a windmill to power the phone.

    Saying the phone is "Air" powered implys (to me, at least) that some chemical reaction is taking place using oxygen or nitrogen.

    It is a cool idea, and the article implies that normal winds are sufficient to power the cell phone.

    If the generator is small enough to actually be part of a cell phone, I'd think that scaling the design up might make economic sense for generating normal electric power. Unfortunately, there weren't any specifics, so it is tough to make any extrapolations.
    • I had the same complaint. Silly slashdot titles.

      -Jesse

    • Re:air vs wind (Score:3, Interesting)

      by Lucidwray ( 300955 )
      To me, this sounds remarkably less like a 'Turbine' and alot like a kids pinwheel with a small coil of wire and magnet stuck on the back.

      To me, Turbine means a multi stage fan, that uses compression of the 'Air'.. If I have to hold it out the window at 60mph to get it to work, its a damn pinwheel.

    • AUUUUUGH!!!! (Score:3, Interesting)

      by nobodyman ( 90587 )

      It is a cool idea...

      NO IT IS NOT!!!!!! AUUGH!!!!

      Okay, I'm sorry.. I just can't take it anymore. This is not an innovation by any stretch of the imagination (you say "portable turbine", I say "little windmill"). Second, the application and practicality are extremely limited. Let's look at the scenarios.

      Scenario 1: You live someplace windy Supposing you take this turbine, stick out your window that receives good airflow in an area that has *continuous* wind (let's say you live in a lighthouse). Gi

  • Other good uses too (Score:5, Funny)

    by nizo ( 81281 ) * on Thursday February 24, 2005 @03:06PM (#11769672) Homepage Journal
    I just realized, there are other good uses for "blow phones" too: simply add a breathalyzer to avoid those embarrassing late night drunken calls to your ex.
    • Police officer: "No sir, this isn't drinking control, but do you mind blowing here and recharging my phone a bit, I'm kinda out or air lately"..

  • Ok then... (Score:4, Interesting)

    by Cheerio Boy ( 82178 ) on Thursday February 24, 2005 @03:06PM (#11769681) Homepage Journal
    Tell me why if this model produces 3 - 4 watts of energy why they can't cover the blades of larger windmills with these things or better yet design the blades so they have edge holes with these things inside.

    The wind blows the large blades which causes air to flow through the smaller fans.

    Of course you could probably put up walls of these things in windy areas and get the same results.

    Any thoughts on this?
    • check out this [energyadvocate.com]
      • check out this [energyadvocate.com]

        What this tells me that the manufacturers are idiots and we can improve it.

        If we're not even close to producing one that is 59% efficient why wouldn't something like this help improve it. From my thinking it would help in several ways:

        1) These turbines are designed for everyday use which means that they have to be cheap and replaceable as they die.
        2) They produce 3 - 4 watts per device. This is not insignificant in larger numbers. How many rivets do you see on large buildings?
        3) By br
        • Check this [earthsci.org]
          you need bigger wing span to generate more power, also the less complicated design, less maintenance time. With large number of small things... although they might be cheap enough not to care about that.

    • Re:Ok then... (Score:4, Informative)

      by whitis ( 310873 ) on Thursday February 24, 2005 @04:45PM (#11770919) Homepage

      Tell me why if this model produces 3 - 4 watts of energy why they can't cover the blades of larger windmills with these things or better yet design the blades so they have edge holes with these things inside.

      There is no such thing as a free lunch (1st law of thermodynamics). The drag produced by the turbines extracting energy slows the speed of the windmill blades reducing the power delivered to the main generator so you gain nothing by adding those (more likely you will lose since the main generator is less efficient at slower speeds).

      Coincidently, this is the same problem with charging the cell phone by clipping this device to the outside of the window while riding in a bus, train, or car. The vehicles engine needs to consume more energy to offset the drag produced by the turbine. Granted it is small compared to the amount of energy used to move the vehicle in the first place but it would be more energy efficient to connect the phone to the vehicles alternator than to convert the engines rotory motion to motion induced "wind flow" and then the wind flow back to rotary motion.

      Now could you make a windmill with no main generator and use a large number of small turbines instead? Yes but it probably would not work well at all. In fact, it would probably work less well than just pointing the turbines into the wind which in turn would not work very well at all. The problem is a serious impedance mismatch. Turbines want high pressure/high airflow. A windmill blade tip will be travelling at a lower linear velocity than the air that turns it.

      Incidently, power from wind is proporional to the cube of the wind velocity. Generators are inefficient at low speeds. Modern windmills adjust to different wind velocities by feathering the blades to try to run the generator at a relatively constant speed. In really high winds they turn the blades parallel to the airflow to avoid destroying the generator and gear train.

      Note that since it was described as a turbine and not a "wind turbine" (which is normally a very different beast) and described it as fitting in a pocket, I am imagining a device with multiple disks with the edge shaped into blades inside a tube like you might find in a jet engine or gas fired power plant (every other disk is stationary or counter rotates to restore longitudinal airflow). A friend built an toilet paper roll cardboard tube sized device out of sheet metal in this topology that was demonstrated with the air from a shop vac that would be about the right size for a cell phone charger. If that is not the topology used., then some of what I have said will not apply but much of it still will.

      Whatever turbine topology you use on your windmill blades, you are converting from wind to rotary motion twice and therefore are reducing the efficiency by around 60% compared to doing so once even if it is well designed and operating at optimal wind speed. And poor performance at low speeds will be made even worse by being being run twice through the innefficent portion of a non-linear transfer function.

      Back to the original article, the usefulness of this is likely to be very limited since people in India who don't have electricity aren't likely to spend a lot of time running around in vehicles every day to charge their phones. A small roof mounted windmill would probably be a lot more practical. It may have some use as a travel charger for people who will be traveling to distant points but not be staying for very long (such as tourists).

      The little generators that run headlights on a bicycle might be another alternative for charging a cell phone. With a stand, pedal power can even be used while stationary. Someone built a generator stand for a bicycle [erols.com] that was capable of generating as much as 260W (100W seems more likely for an extended period of time).

      A small solar panel with built in battery (so you don't need to leave your cell phone on char

  • "It costs around $4, fits in your pocket and runs on air ;-). What else do you want ?"

    Yeah, try and explain THAT to the airport security guard when he pulls you outta the line
  • What else do you want?
    Summaries that are closer to the reality of the article.
    It costs around $4.
    "The technique is not yet commercialised but the department has sent a proposal to the ministry of science and technology to help manufacture the turbine on a large scale, Das said."

  • A better idea! (Score:3, Insightful)

    by STratoHAKster ( 30309 ) on Thursday February 24, 2005 @03:11PM (#11769748) Homepage
    They sell radios that can be charged by turning a crank, why not sell a cell phone charger that works that way?

  • wind? (Score:4, Funny)

    by Loconut1389 ( 455297 ) on Thursday February 24, 2005 @03:11PM (#11769750)
    "What else do you want?"

    -wind?

  • Rocket in My Pocket (Score:2, Interesting)

    by Doc Ruby ( 173196 )
    "The device is best suited for coastal areas where the wind flows almost continuously."

    How about just whirling in circles the dinky turbine by the cord by which it attaches to the recharging phone? Why bother waiting for the wind when you can wind your phone instead?

  • Crank Alternative (Score:5, Interesting)

    by 4of12 ( 97621 ) on Thursday February 24, 2005 @03:14PM (#11769786) Homepage Journal

    Compressed air is an interesting idea for storing energy.

    But I have to wonder how it compares to the alternatives.

    How about a capacitor [electricitystorage.org] bank and a hand-crank generator [pasco.com]?

    If you're out of compressed gas or batteries in the middle of nowhere it's hard to replenish your cell phone. Turning a hand crank would make use of cheap, available human power.

    • Turning a hand crank would make use of cheap, available human power.

      A pocket hand crank? I can see it now, a whole new array of pickup lines...
      "Excuse me miss, can you turn my hand crank? It's in my pants."
  • Replenish your airtime with.. uhm.. some air time!

  • $4? No it doesn't (Score:5, Insightful)

    by DrXym ( 126579 ) on Thursday February 24, 2005 @03:17PM (#11769821)
    If / when it appears in a commercial form it might costs $4 in India perhaps. But in the US it will cost $50.

    Why? Because people are suckers.

  • 4W for $4 would be significant (Score:3, Funny)

    by shlashdot ( 689477 ) on Thursday February 24, 2005 @03:20PM (#11769850) Homepage Journal
    That's $1 per watt, which is the holy grail of renewable energy technologies, being the approximate cost of conventional power plants.
  • So, a blonde would be able to charge it and talk on it at the same time? :D
  • I aways wondered if this could be done. I consided hooking such a device up to the overhead air blowers they have on commercial airplanes to charge cell phones and laptops. There is probably a FAA law against this however.
  • What else do you want ?

    Flying cars perhaps?
  • If they could make a charging device that was powered by my six-year old's pure exuberance (sp?) for life.

  • Whistle? (Score:3, Interesting)

    by adolfojp ( 730818 ) on Thursday February 24, 2005 @03:37PM (#11770045)
    Can you blow on it like a whistle to charge it?

    Adolfo
  • This is an incredible step forward, but not for us people who can already charge our cellphones in our cars, in the office, and at home, and just want to charge them in the supermarket, too.

    Think wider.

    Think mine detectors.

    Think Cambodia, Rwanda, Ethiopia.

    People who really, really need some piece of low-power electronic equipment, and DON'T have four different charging stations already, and whom it will cost an arm and a leg - literally! - if they are careless.

    Coming to think of it, I'm not surprised t

  • If only they could scale this technology up.... (Score:5, Funny)

    by mikael ( 484 ) on Thursday February 24, 2005 @03:46PM (#11770123)
    .... then we could have an electric powered car which recharges the battery automatically.
  • I spent most of 2004 in York, UK, and it was moderately windy all day long (and annoyingly so at times). So this is not so far-fetched as it sounds...

    I reckon many other places in the world are fairly windy, even if they are not a coastal city or some such.

  • The device will help mobile phone users charge their phones while travelling in a bus, a car or a train. All they need to do is -- place the turbine against the wind flow.

    Why didn't I think of it! A way to use the power of my car to charge my cell phone. Ingenious!
  • I wish that the editors would only post stories that actually had some specs or detailed description of the tech behind new devices. Just a press release and some hype would only warrant a couple of sentences.
  • I can just see the next version of the SCOTTEVEST [scottevest.com] with turbines on the hood, combined with the solar epaulettes... perhaps voltaic electrodes in boots for when trudging through salt marsh?

  • Perfect for motorists! (Score:5, Funny)

    by Cyn ( 50070 ) <cyn AT cyn DOT org> on Thursday February 24, 2005 @04:12PM (#11770486) Homepage
    Now if your cell battery starts to get low while chatting to your friend while driving, you can just crank up your A/C, roll down your window, and hold one arm out the window while you eat and change the radio station with the other.

    Or for when your battery is a little low, but you just really need to call someone - you can blow on your phone for a few minutes, then pass the phone to a friend (if you have any left) and they can call 911 since you're hyperventilating.

    Seriously, in public transportation - of the times when you can hold your phone up to a window - you might want to purchase some tshirts that say "I'm an idiot, steal my expensive phone after I get off the bus". Any other times, you should be able to find a much more efficient and timely manner of charging your phone. Windows down + A/C up == your car is burning excess energy.

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