Wearable microgrid (IMAGE) University of California - San Diego Caption The wearable microgrid uses energy from human sweat and movement to power an LCD wristwatch and electrochromic device. Credit Lu Yin Usage Restrictions Please credit: Lu Yin License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.