For Far Smaller Fuel Cells, a Far Shorter Wait
Prototypes of long-lasting fuel cells that can replace batteries are being tested in laboratories in US and overseas; every big electronics company in world is working on fuel cells; some, like Intel, are going step further and investing millions of dollars in start-up companies like PolyFuel and Neah Power Systems to accelerate development; many analysts expect fuel cells for some consumer electronic devices to begin appearing next year in Japan; betting is that first to reach market will be Toshiba, which is demonstrating prototype of methanol-powered cell this week at trade show in Hanover, Ger; Toshiba says cell could be sold next year with laptops; chart; photo (M)
