Flexible, self-healing wearable device harvests energy from body heat

Wearable electronic devices are starting to save some battery power by harvesting an energy source that’s right underneath them: human body heat. But while flexible devices are more comfortable to wear, they aren’t quite as effective at soaking up that heat as rigid ones. Now a team from North Carolina State University has developed a system using liquid metal components, making it flexible, efficient and even self-healing.