Powercast exhibited at the Sensors Expo 2011 and demonstrated using RF energy harvesting to wirelessly charge credit card size devices. The devices are representative of high function, rechargeable smart cards and contained rechargeable thin-film batteries - CYMBET EnerChip, Infinite Power Solutions THINERGY, and STMicroelectronics EnerFilm.
The video below shows the rechargeable smart card devices receiving charge from an RF transmitter. The transmitter was on the floor under the table.
For more wireless power videos visit Powercast’s channel on YouTube.