9 fuel cells; batteries and battery packs for medium-duty and heavy-duty commercial vehicles; fuel management systems comprising electrical power regulators for fuel dispensers; downloadable and recorded computer software that is an integral component of medium-duty and heavy-duty commercial vehicles for monitoring, optimizing, operating and regulating the storage, current, and discharge of electric energy and power throughout vehicles for safety and driveability; downloadable and recorded computer software that is an integral component of medium-duty and heavy-duty commercial vehicles in the nature of vehicle operating system software; downloadable computer software applications and mobile phone applications for monitoring levels of power and electric charge in vehicle systems and status of medium-duty and heavy-duty commercial vehicles