Researchers develop new battery-free technology that draws power out of thin air. Researchers have developed a new technology to harvest ambient or 'waste' RF signals and use them to power small electronic devices.
https://image.nostr.build/e47c9e4d846a9e8a305b9342651af7be2a96afc1073b3d4dc2df9a2561edf13a.jpg
The key innovation is a nanoscale spin-rectifier that can convert extremely low-power RF signals of less than -20 dBm into a usable direct current voltage. This device overcomes a primary pain point of existing RF energy harvesting rectifiers, which struggle to operate efficiently at low ambient power levels. 

 The technology leverages the abundance of RF signals emitted by Wi-Fi, Bluetooth, and 5G networks that surround us. These signals, which are primarily used for data transmission, can also serve as an untapped energy source.Air-Gen Device: One approach involves the creation of an "Air-gen" or air-powered generator. This device utilizes electrically conductive protein nanowires produced by a microbe called Geobacter. By connecting electrodes to these nanowires, electrical current can be generated