RF battery chargers will be coming soon from Powercast. The chargers work by emitting an RF signal from an attachment to a powered source such as a lamp. There is a receiver that is placed with the battery which constantly charges the battery. The RF signal apparently does not have a very long range - the article does not make it clear if this is due to government regulations or a technological limitation. My mind is drawn to the works of Nikola Tesla who is said to have developed a similar technology 80 years ago (which may have been used to power an AC car). In the case of Tesla he was apparently working on RF emitted by the electro magnetic fields of the earth.

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