The article seems a bit quick to dismiss Ryobi's little 4V batteries; seems plausible to take 5 of those, build an enclosure for 'em, and get the sort of 20V battery proper power tools typically expect - then multiply that 5-piece unit for greater capacities. I'm sure it ain't <i>quite</i> that simple, but it'd still be pretty neat.<p>On another note, if we ever get to the point where DeWalt makes a ruggedized laptop or tablet powered by their 20V battery packs, that'd also be pretty neat.