Eco Factor: A wind-up audio and video player that can charge your cellphone with green energy. Trevor Baylis has launched its new Eco Media Player Revolution, which is an upgraded version of its earlier wind-up music player. The new Revolution...

It seems that with the growing prices of fossil fuels and lack of their availability, we are ready to eat a bit more and power up our gadgets by using our own muscle power. There has been a surge in the number of wind-up gadgets in the past year or...