LiHD battery packs offer ultimate performance and extremely long use with minimal temperature development. The ultra-M technology features intelligent battery management for maximum performance and gentle charging. It includes patented "AIR COOLED" charging technology and permanent electronic single cell monitoring (ESCP) during charging, ensuring particularly long life. The processor-controlled charge and discharge management allows for efficient operation, while the capacity display provides constant monitoring of the battery status. With long shelf life and almost no self-discharge, this battery is compatible with all 18 V machines and chargers from CAS partners.