(char·kha also char·ka n. A spinning wheel used in India for spinning cotton. [Hindi carkh

From DailyIndia:
Weavers will now be able to spin and also generate their own electricity with the help of 'E-charka', which will be launched by President Pratibha Patil on November 19. As the wheel produces yarn, its motion is converted into electricity making use of a three-phase A/C generator which in turn is connected to lead acid batteries.
Operation of the charka for four hours can generate electricity to operate a Light-Emitting Diode (LED) light and play a radio for over seven hours.
...It took two years to develop the cost effective-eco friendly charka with a dynamo that reduces 30 tonnes of carbon dioxide.
...Over 1.2 million rural folk in India spin charka to earn their daily bread....MORE