Nokia Self-Charging Cell Phones Are Here?
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Most of us might think the idea of a self-charging cell phone sounds like something out of science fiction. Yet as you can see here, Nokia has found a way to overcome the problem of the dying cell phone and from the sounds of it, I think it might have a workable solution.
Imagine Nokia phone harnessing nearby transmitters for wireless charging. Whether it be a standalone unit that you have in the home or something like what you might see with RFID type stuff where the phone is charging as you pass by them, at the end of the day is comes down to just how indefinitely it can run without plugging into the charger sticking out of your wall.
Some have pointed out that Tesla came up with much of this stuff over a century ago, but it seems like now more than ever it will be this kind of technology in the mobile world that redefines where wireless power is headed.
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3 Comments
Samuelfur
June 19th, 2009
at 10:00pm
awsome!
ImTim
June 19th, 2009
at 10:06pm
That’s amazing! Now apple needs to make te iPhone charge off the cell network somehow. That would be truley amazing!
Kevin
June 20th, 2009
at 12:25am
if you follow the references back a couple of pages, you get from the cnet story, to the http://www.guardian.co.uk/environment/2009/jun/10/nokia-mobile-phone that it came from, then
http://www.technologyreview.com/communications/22764/
each article is based on the one before it.
This is an idea that has been around for a long time. Yes it was first attempted by Tesla, and also is the basis of how a crystal radio works (if you don’t know, a crystal radio is a real radio with headphone, that uses no batteries, other radios use power, and transistors, preceded by vacuum tubes to amplify the signal)
The issue is, yes you can get a signal on an antenna, that is electricity on a wire, but you have to make it useful power. It is difficult to get it into a useful DC current, without losing all the voltage and current to internal resistance of your diodes. Ever since Tesla, people have been claiming to be able to do this, just like they have been claiming to run car engines on plain water.
It’s likely Nokia is using some advances in antenna design, (fractal folded antenna?) similar to the internal antennas already being used in cell phones. But even using a 20 foot antenna, people are unable to get more power than a button cell watch battery, when it’s actually tested.
Reading the source articles, they are not intending this to be primary power, but to be used with solar cells, etc.
If they are making advances, I’d expect we’d be more likely to see it’s use in other lower power devices. We already have watches powered by kinetic energy, or by solar power, this RF power could power things like clocks, temperature sensors(actually that’s in the original article), things like your car alarm and garage door opener remotes, hey, even TV remotes.