This part says it all...The aluminum-air battery uses air and water to unlock the energy stored in aluminum. According to Phinergy, just one of the 50 aluminum plates in the battery can power a car for approximately 20 miles, and when used to supplement a lithium-ion battery, can extend vehicle range by approximately 1,600 kilometers (1,000 miles). The technology allows an energy density that surpasses conventional battery technologies and creates electric vehicles with travel distances, purchase prices and life-cycle costs that are comparable to fossil-fuel cars.