Fuel cells

Interesting. Toshiba has prototyped what is called Direct Methanol Fuel Cells (DMFC - damn, one more acronym) and initiated tests with their mobile audio players.

An excerpt from the story by NE Asia:

The 100mW unit, similar in shape and size to a pack of gum at a 23 (W) x 75 (L)
x 10mm (D), can power the Flash-based player for approximately 35 hours on a
single 3.5ml charge of highly concentrated methanol, the fuel that drives the
electricity-producing chemical reaction in the fuel cell. The 300mW unit is 60 x
75 x 10mm and delivers enough power to keep an HDD-based audio player running
for approximately 60 hours on a single 10ml charge.