Alrighty then. "a current of up to 1 volt". Any science or engineering journalist, even at MIT News level, could get that wrong, but not all of them. They should have better fact-checking.

Neat application though. Obviously, don't expect to buy one next week. But what's interesting here is that you'd think that electrochemical cells, which are going to scale by volume (cube law) as they get smaller, would not be as effective in these micro-scale applications as the energy harvesting/wireless energy schemes people seem to like work on, which mostly scale by aperture/area (square law). They treat that in passing, basically, the problem with solar is sometime's it's dark, but it's not very edifying.