This cunning little device, available from Expansys, is the MiniWiz HYmini Wind Powered Charger. It will charge any 5V portable device that has a mini-USB socket, using yep you guessed it, wind!
Internal battery charging starts when the wind speed reaches 5mph, but it is recommended that the Hymini is fitted to a bicycle, car, or even on the arm while jogging in order to increase the speed at which the air hits the turbine. There are 2 accessories available for carrying the MiniWiz HYmini – the Bike Holder Kit and an Armband Kit.
Of course, it’s a less savoury thought that perhaps there is another kind of wind that could power this. A tin of beans in some people I know would probably result in power for several phones!
Check out the Expansys site if you want to pick one up for £39.99