The Battery Box is a home-built semi-streamlined car created for the purpose of attacking the World Speed Record for electric-powered vehicles. Using the latest technology in both motor/battery combinations and vehicle design, Roger Hedlund of Sunnyvale, California, achieved his goal in 1974 at the Bonneville National Speed Trials. The car's speed for a two-way average over a measured mile was 174.918 mph. This record held until 1997.