21/09/2008 19:19. According to the Raleigh News & Observer newspaper in North Carolina, the Advanced Vehicle Research Center, a small Raleigh company, can outfit a Toyota Prius gasoline-hybrid car with a second battery pack that can plug into a wall outlet to recharge.

The result, says the newspaper: "A car that breaks a once-unimaginable fuel-efficiency barrier and delivers 100 miles per gallon," which is more than double the current Prius mileage. "The spare battery costs less than 75 cents to charge and gives the plug-in Prius about a 35-mile range... // Orlando Sentinel