A battery module for construction of a battery pack includes a battery sealed in a rectangular housing with front and rear open ends closed by front and rear plates, respectively. The rear plate includes a plurality of rear plate bores in axial alignment with a plurality of housing bores proximal the rear open end of the housing. The front plate includes a plurality of front plate bores in axial alignment with a plurality of housing bores proximal the front open end of the housing. The front plate additionally includes positive and negative terminals electrically connected to the battery.