BOSCH Batteries. With 95 years of battery experience, Bosch has a comprehensive line-up of maintenance-free batteries. Products include the SM Mega Power Plus and ST Hightec range of EFB and AGM batteries. Bosch’s extensive research-and development capability and knowledge of battery technologies has furnished its AGM range with up-to-the-minute technologies. Bosch remains at the forefront of the development of battery products for modern vehicles.