Battery-powered EVs are in the spotlight right now, but that doesn't mean car manufacturers aren't looking at alternative fuel sources. At its "Innovation Day" in France, BMW unveiled a prototype 5 Series GT that uses a hydrogen fuel cell to power its electric motor. We've seen the company experiment in this space before -- the Hydrogen 7 used the element to power a combustion engine -- but this is its first complete FCV package. Unlike the Hydrogen 7, which managed roughly 124 miles on hydrogen, the modified 5 Series can easily top 300. With 245 horsepower under the hood it's no slouch either, although we doubt it would keep pace with BMW's electric i8 in a drag race.