Forget the “Brick”, This Power Supply for Wearables Is Soft, Stretchable, and Solar-Powered

Skin-like wearables—sensors and other electronics that can be worn comfortably for days at a time because they stretch and feel just like skin—made a big splash at CES. But the first generation of these “electronic tattoos” are externally powered, that is, they harvest RF energy to respond to an external reader. That’s fine for a limited range of applications, when you want to make spot checks of somebody’s temperature, say. For anything else, though, wearables need power on board—that means batteries and some way to charge them. But, to date, a power supply has represented the antithesis of soft, conforming, skinlike electronics: we don’t call an external power supply a brick for nothing.”