Working wireless battery charge

[fards]

http://news.bbc.co.uk/1/hi/technology/8165928.stm

demonstrated tech that enables devices (demonstration includes the G1) to be charged wirelessly..

It's been talked about for a while, but nothing concrete has been shown before!

Supposedly available within 12-18 months!

[orb3000]

Topic sounds very interesting
But I couldn´t open the link:confused:

[stepw]

The emitter has to be very powerful for the charge current to be high enough on the device being charged. There's also a huge waste of energy that grows exponentially with the distance. This is one of the reasons this technology has been primarily used for short range applications so far. This is exactly how wireless keyfobs/smart cards work, but their useful range is limited to 1 meter or so and their consumption is minimal in comparison with mobiles.

Heck, I even have my electric toothbrush charging this way and my electric tea pot drawing power from the base wirelessly, but effective range is millimeters in these cases.

Nobody knows for sure what kind of effects strong electromagnetic fields have on humans. Knowing that electric impulses drive our brains and bodies too, I think strong electromagnetic fields are more than likely to cause major interference. IMO it'll be a while before healthcare people approve use of this kind of chargers.