Scientists have devised new technology which generates electricity from body heat, allowing you to charge electronic devices on the go.
Professor Byung Jin Cho from the Korea Advanced Institute of Science and Technology (KAIST) in South Korea is leading the team working on a thermoelectric (TE) generator.
The small and flexible generator, made from glass and fabric, can be used to power up heart monitors, smart glasses and other wearable tech.
"Mobile phones consume high electrical energy compared to electrical sensors. Right now we are trying to make a sample that provides electricity for medical sensors," Cho said.
"After that, smartphones will be the next application of the TE generator," Cho added.
The device uses the the small but significant temperature difference between skin and air to create power.
Exciting times. no more flat batteries, unless you have cold hands..
found in the Express