An electrathon is a competition to go the farthest in one hour powered only by commercial rechargeables batteries weighing no more than 73 pounds (33 kg) (two car batteries). The record is 62.05 miles (99.86 km) as of February 2011.

It involves three- or four-wheeled electric vehicles, somewhat similar in overall appearance to a Go-Kart with an aerodynamic body, but powered by an electric motor and batteries. Electrathon class vehicles are principally defined and constrained by length and width (12 feet long and 4 feet wide or 3.6 m × 1.2 m maximum) and by battery weight and chemistry (73 pounds or 33 kilograms, sealed lead acid). Discharged for one hour, this amounts to just under one kilowatt (1.3 hp). Driver's weight is ballasted to 180 lb (82 kg) for fairness, and the vehicles themselves may weigh from 80 to 150 pounds (36 to 68 kg). Safety regulations require features such as braking systems, roll bars, and electrical disconnects. (source)