42 Design and development of energy storage systems; consulting services in the field of design and development of energy storage systems; analysis and testing of energy storage system performance, configuration, and design; design and development of batteries, battery packs, and battery modules; consulting services in the field of design and development of batteries, battery packs, and battery modules; analysis and testing of battery, battery pack, and battery module performance, configuration, and design; design and development of automated power management systems and sub-systems; consulting services in the field of design and development of automated power management systems and sub-systems; analysis and testing of automated power management system and sub-system performance, configuration, and design