For a while now, battery tech has been one of the biggest bottlenecks through which future devices and impressive features must squeeze before they arrive. Progress on that front, as you may have noticed by your phone dying during your commute every night, has been slow. Instead of moving forward, though, battery advances can move sideways. Wireless charging is at the forefront of these sideways advances, and a new system in which an e-ink display can be wirelessly charged via NFC proves just that.