According to The Times of London, Nokia is developing a self-charging phone. The phone would use the kinetic energy created when a user moves around to keep the battery charged.

Nokia filed a patent with U.S. authorities and the Times picked it up. Although the technology is being developed for a phone, it could be used in the future to power all kinds of electronic devices.

"The machine would work through the use of piezoelectric crystals, a substance that creates an electric current when bent or compressed, for example in the igniter of a cigarette lighter or in a gas oven."

Nokia has not said when a device using the technology would appear on the market. A spokesman said: “Power management has been an important topic since the early days of mobile communications and so continues to be one of the areas for research, but we cannot comment on whether or when inventions described in patent applications may eventually appear in products.”