Researchers have developed a technology that uses the radio frequency of WiFi signals to generate wireless green energy that could power small electronic devices without the need for a battery. If the research of the team from the National University of Singapore (NUS) and Japan’s Tohoku University (TU) follows through the recent success in powering a light-emitting diode (LED) wirelessly to power small electronics, the need for batteries in small devices could diminish, easing the growing pressure on critical battery metals. “We are surrounded by WiFi signals, but when we are not using them to access the Internet, they are inactive, and this is a huge waste. Our latest result is a step towards turning readily-available 2.4GHz radio waves into a green source of energy, hence reducing the need for batteries to power electronics that we use regularly,” said Professor Yang Hyunsoo from the NUS Department of Electrical and […]