Windows Phone Thoughts: Micro-Engines To Eventually Power Your Pocket PC?

Most of the time somebody talks about futuristic ways of powering electronic devices, fuel cells are the focus. But here's some information from [gulp] The Register that goes down a different track.

"A research team from the University's Mechanical Engineering department lead by Dr Kyle Jiang have developed a motor just a few millimetres in size that can nevertheless generate more than 300 times as much energy as an ordinary battery. The engines (left) could be used to charge mobile phones and notebook PC batteries in just a few seconds, the team believe, eliminating the need to leave them hooked up to the mains...Soon everyone will be able to charge their mobile phones instantly using a shot of cigarette lighter fuel instead of having to find a socket for a charger and wait while the phone charges up."

Interesting, huh? Of course, nobody knows how soon something like this might be available, but I'd bet we're talking another 10 years or so. Besides, I'm not sure which I'd prefer: the explosion risk of a hydrogen-driven fuel cell or a tiny internal combustion engine inside my Pocket PC. I guess it all depends on what kind of mileage I get...