Electric trucks; range extended electric trucks; Electrically-powered motor vehicles; Powertrains and drivetrains for vehicles; Electric powertrains and drivetrains for vehicles; motors and generators for use as auxiliary power sources for electric land vehicles; hybrid systems for vehicles, namely, axles with regenerative brakes, batteries and electric motors for trucks and trailers; fuel efficiency technology for vehicles, namely, axles with regenerative brakes, batteries, and electric motors