The Featherweight Championship of Robot Wars Extreme: Series 1 was one of the many single battle events of Robot Wars Extreme: Series 1. This Featherweight Championship was contested by just two machines, which were required to weigh less than 11.4kg, making it the smallest class to fight in the main arena. * Notably, both of these competitors were very light featherweights, weighing only 4 kilos each. * Beef-Cake took the Featherweight Championship title off Demolisher, which was also well below the weight limit, and based on an RC car.