I just received information through on this from Expansys and thought it was pretty cool.
The Hymini is a handheld device which uses wind power to generate electricity.
Generated electricity* is used to charge an internal 1200mA/h lithium ion polymer rechargeable battery. Mobile phones, mp3 players, digital cameras, and any other 5 Volt device can be recharged from this portable power bank.
The Hymini can also be recharged from the mains electricity supply (via an adapter).
Wind Power
As you can tell by looking at this photograph of this handheld device, the wind turbine is very small. From the calculation of wind power we know that the power output of a wind generator is proportional to the area swept by the rotor, and proportional to the cube of the wind speed. Therefore, in order to generate any useful electricity with a wind turbine of this size, high wind speeds are essential. 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. The maximum charging wind speed is 40mph - no extra power will be converted above that speed. Peak power output for the turbine is 1 Watt.
The manufacturers (MINIWIZ Sustainable Energy Dev. Ltd.) claim that if Hymini is mounted on a bicycle or jogger for one hour, enough electricity will be generated to provide 15 minutes of mobile phone talk time, or to take 50 digital photographs.
The Hymini internal battery can output 5 Volts DC at a current of 200-850mA. With a full internal battery, an iPod can be charged in one hour via the Hymini USB charging connection.
Box Contents :-
HYmini Wind Powered Charger
US Style Mains Adaptor (100-240V)
Instruction Manual
Ziplink USB Cable
Charging tips for Nokia, Sony Ericsson, Motorola, LG and Samsung mobile phones.
No word yet as to whether this would fit HTC devices but at 5V and 850mA it should do.