The ISS is a system designed to improve fuel economy by automatically turning the engine off and on when the vehicle stops or starts. The ISS systems require higher charging efficiency and durability since they are more frequently discharged than normal systems. DN Automotive EFB Batteries are perfectly suited for such systems. Durability is improved by applying corrosion-resistant alloys and improved materials. Enhanced startup capability and charging efficiency is achieved by low resistance envelope separators and special carbon technology.