The e-cars are coming. You know about hybrids such as the gas-electric Prius, but they were just the first step in a long evolution toward virtually emissions-free, high-mileage vehicles. The next frontier is gas-free, 100 percent-battery powered cars: this year and next, more than a dozen electric vehicles (or EVs) will start to appear in showrooms and rental fleets. To show you what’s coming, we’ve rounded up a baker’s dozen. Our focus is fossil fuel-free vehicles (so no hybrids) from manufacturers with a proven track record. 2011-01-21