Discussions

« Back 1 [2]

This discussion relates to Technology Review's article Wireless Power Harvesting for Cell Phones.

• 
  Phineas
  

  Posts:
  85

  Avg Rating:
  

  

  Reply

  06/09/2009 11:32 AM

  RE: Charge

  When recharging your pacemaker off the microwave oven, remember 'never put your finger in the light socket'.
  
  http://4gifs.com/gallery/d/85247-2/Electrocuted_on_train.gif

  Rate this comment:
• 
  joelsapp
  

  Posts:
  6

  Avg Rating:
  

  

  Reply

  06/09/2009 05:35 PM

  [no subject]

  Since they mention that this would only work if the phone is off, I would think they would have a battery saving mode that would shutoff the phone during the evening or if you are in a specific location - and have your calls transfered. Like xfer your calls to work or your landline when you are in a specific area.

  Rate this comment:
  • 
    drudic
    

    Posts:
    2

    Avg Rating:
    

    

    Reply

    06/10/2009 05:55 AM

    Re:  Power-less

    Well being that cellphones do spend majority of their life time in a low power mode it does seem like an appropriate devise to implement this kinda technology into. Even if this kinda battery charging method was able to charge just enough to keep my mobile at constant power level during low power mode, or when its not being used, it would be really something.
    

    Rate this comment:
• 
  ferreirabill@gmail.com
  

  Posts:
  1

  Reply

  06/11/2009 02:31 AM

  Replace the battery with a capacitor

  While a capacitor has lower capacity than a battery, it also is much more efficient to charge. A side benefit would be a less expensive phone since capacitors are a small fraction of the cost of a battery. If the signal was too weak to charge the capacitor, it would probably also be too weak to make a call. The net would be a RFID like phone, it would only work where it would completely work: power and signal strength.

  Rate this comment:
• 
  yenaldlooshi
  

  Posts:
  2

  Avg Rating:
  

  

  Reply

  06/11/2009 09:48 AM

  Free power

  Neat idea!, but having a 3 meter satellite dish connected to your cell phone is a bit inconvenient.

  Rate this comment:
• 
  kansan
  

  Posts:
  1

  Reply

  06/12/2009 12:29 AM

  No Doubt

  The engineers have constructed wide band, and band specific RF field strength meters to get an idea what kind of power could be harvested from ambient RF fields. I would think the best they could hope for is to recharge a battery, or perhaps that capacitor another mentioned. Most likely broadcast transmitters, would be the most practical source, 24/7 operation at fairly high power levels.

  Rate this comment:
• 
  john99872546
  

  Posts:
  1

  Reply

  06/12/2009 03:10 AM

  Technology

  Would it not cause any harm to the transmitters around? Will there be any distortion in radio signals or something like that?
  
  John Wright
  Glowtouch Technologies
  

  Rate this comment:

« Back 1 [2]