Wearable Ring Device Body Battery
Photo credit: Xiao Lab
Colorado University researchers have developed a wearable ring-like device that turns human bodies into biological batteries. Since it’s made from an extremely flexible material, you can also wear the device as a bracelet or other accessory that makes contact with the skin. It converts the body’s natural internal heat via thermoelectric generators to usable electricity. This may not be a practical source of power now, as it only produces 1 volt of energy for every square centimeter of skin space, but the device does show promise.