Maximize your tool’s performance with the 4.0 Ah battery, offering a 33% increased run time compared to 3.0 Ah batteries, all without adding extra weight or bulk. Keep track of your power with the LED charge level indicator, providing a quick view of the remaining battery power. The Battery Protection System ensures Over-Discharge, Temperature, and Current Protection, contributing to enhanced performance, battery cycle life, and overall battery longevity, particularly when used with STAR marked tools. Li-Ion Batteries offer extended run time compared to Ni-Cad and Ni-MH batteries and provide more cycles over the battery’s life. Experience the efficiency of the Optimum Charging System, utilizing 3 Active Controls (Current, Voltage & Temperature) to maximize battery life. The Built-In Memory Chip communicates with the Charger CPU, optimizing the charging process based on the unique conditions of each battery. Trust in this battery for extended run time, reliability, and longevity in your power tools.