Aaanyway, we're not here now to talk about your digital life balance. We're here to talk about how cool this battery is. And it's pretty cool. It looks like a little chip, maybe the size of an SD card, and it's made of a translucent silicone rubber material stamped with aluminum and copper electrodes and assorted connections. Its creators, a team of engineers from China, Korea and Illinois, hooked the battery up to a red LED light and demonstrated that it continued to work when folded, twisted, and stretched to the size of small notepad, then pulled over an elbow, like a large Band-Aid.