Troy, Mich., in the belly of the automobile industry, is an odd place to spark a revolution against the internal-combustion engine. But, then, Stanford Ovshinsky is no ordinary gearhead. Although he never went to college, he founded a new field of physics based on the superconductivity of certain alloys. The company he formed in 1960, Energy Conversion Devices, makes the photovoltaic cells used on the Mir space station to generate electricity from sunlight. In the '80s the Japanese licensed his patents to produce digital video discs. But what really revs him up these days is a car battery. How dull is that? Not at all, if it can change the world," as he claims with a subversive glint in his eye. When Ovshinsky talked of scaling up his battery to run a car, he was ridiculed. "The auto companies said it wouldn't work," he recalls. "Then, after one car got 200 miles on a single charge, they said it couldn't be manufactured. Now that we are making them, they say it is too costly. But that is a red herring too." Ovshinsky's team of engineers and electrochemists has slashed the cost 40% in two years, they claim. If automakers would commit to buying tens of thousands, Ovshinsky says, the batteries would make electric cars as cheap as gasoline models.