Nokia developing over air phone charging

If you've ever been caught out by forgetting to charge your phone, Nokia is working on some technology that could stop you running out of juice when o

Technology Review is reporting that the Finnish mobile giants are developing tech that will mean your phone will get charged over air from "ambient radio waves".

This will include radiation from things like Wi-fi transmitters, TV masts and mobile antennas, that can then be converted into electrical current to give your phone a boost.

The good thing is, your phone won't even need to be on to benefit, and Nokia reckons the technology could be seen in a product within three or four years.

Some aren't so sure – Nokia is working towards a prototype able to hold 50 milliwatts of power, but right now, they've only managed to hit 3 to 5 milliwatts.

Still, Rome wasn't built in a day and all that. We're looking forward to seeing Nokia's developments with the tech as it happens, and will of course keep you updated.