HIGH PERFORMANCE: 60 Volt Max* 4.0 Ah lithium-ion battery provides extended run time for heavy duty applications INTELLIGENT POWER MANAGEMENT: Optimizes individual battery cells for maximum power, performance, and runtime COMPATIBILITY: Works with all X6 60 Volt Max* series of tools CONVENIENCE: Battery power indicator on battery shows the remaining charge SHOCK RESISTANT DESIGN: Helps protect battery against damages from accidental drops CHARGE TIME: Charges in 85 minutes or less