The Bosch S4 battery with EFB technology is designed to meet the requirements of vehicles with start/stop systems. It ensures a reliable start, even when many electrical consumers in the vehicle are in operation. EFB technology (Enhanced Flooded Battery): The positive plate coated with polyester scrim provides additional support for the active material and high cycle stability. It offers a longer lifespan and double cycle stability compared to conventional starter batteries. Reliable starting even in extreme temperatures and with a high number of electrical consumers. Particularly good charge acceptance and high short-distance performance. Completely maintenance-free and leak-proof.