later, the electric automobile industry had effectively disappeared. Years passed without a major revival in the use of electric cars. Fuel-starved European countries fighting in World War II experimented with electric cars such as the British milk floats and the French Bréguet Aviation car, but overall, while ICE development progressed at a brisk pace, electric vehicle technology stagnated. In the late 1950s, Henney Coachworks and the National Union Electric Company, makers of Exide batteries, formed a joint venture to produce a new electric car, the Henney Kilowatt, based on the French Renault Dauphine. The car was produced in 36-volt and 72-volt configurations. The 72-volt models had a top speed approaching and could travel for nearly an hour on a single charge. Despite Kilowatt's improved performance with respect to previous electric cars, it was about double the cost of a regular gasoline-powered Dauphine, and production ended in 1961. 1960s1990s: Revival of interest In 1959, American Motors Corporation (AMC) and Sonotone Corporation announced a joint research effort to consider producing an electric car powered by a "self-charging" battery. AMC had a reputation for innovation in economical cars while Sonotone had technology for making sintered plate nickel-cadmium batteries that could be recharged rapidly and weighed less than traditional lead-acid versions. That same year, Nu-Way Industries showed an experimental electric car with a one-piece plastic body that was to begin production in early 1960. In the mid-1960s a few battery-electric concept cars appeared, such as the Scottish Aviation Scamp (1965), and an electric version of General Motors gasoline car, the Electrovair (1966). None of them entered production. The 1973 Enfield 8000 did make it into small-scale production, 112 were eventually produced. In 1967, AMC partnered with Gulton Industries to develop a new battery based on lithium and a speed controller designed by Victor Wouk. A nickel-cadmium battery supplied power to an all-electric 1969 Rambler American station wagon. Other "plug-in" experimental AMC vehicles developed with Gulton included the Amitron (1967) and the similar Electron (1977). On 31 July 1971, an electric car received the unique distinction of becoming the first manned vehicle to drive on the Moon; that car was the Lunar Roving Vehicle, which was first deployed during the Apollo 15 mission. The "Moon buggy" was developed by Boeing and GM subsidiary Delco Electronics (co-founded by Kettering) featured a DC drive motor in each wheel, and a pair of 36-volt silver-zinc potassium hydroxide non-rechargeable