Free Handphone Charging, Anybody?

Rediff.com: All you need to charge your mobile is — air!
Students at the Department of Industrial Design at Indian Institute of Technology, Delhi have attached a turbine with a mobile phone that helps charge it even when the user is travelling, Head of the Department Professor Lalit Kumar Das told PTI.
“The electricity generated by the turbine when moved by wind energy could charge a cellphone in an emergency. It generates electricity to the tune of 3 to 4 watts which is sufficient to charge a mobile phone,” he said.
The specially designed turbine, which costs about Rs 200 to be developed inside a laboratory, is so small that it could be easily kept in a pocket, he said.
The primary objective of the device is to extend mobile ‘connectivity’ where there is no electricity. The device also saves energy, though not to a significant extent, he said.
The electricity could also be used for other purposes such as illumination and playing a radio. High intensity light devices (HILDs) and radio require low energy to function that could be easily provided by the turbine, he said.
Using air to charge cellphones? IIT-Delhi does it! [Rediff.com]