Nokia says it’s developing technology that could draw enough power from ambient electromagnetic radiation waves to keep a cell-phone handset topped up. Wi-Fi transmitters, cell-phone antennas, TV masts, and other emit these waves.
Developers use the same principles as a crystal radio set or radio frequency identification (RFID) tag. They convert electromagnetic waves into an electrical signal.
Ultimately, Nokia plans to use the technology in conjunction with other energy-harvesting approaches, such as solar cells embedded into the outer casing of the handset.
So much for teachers hoping that student cell phones will loose power in classrooms.
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