Powerful lithium ion battery pack compatible with all STIHL cordless machines (not recommended for the MSA 160 C-BE, BGA 85 and RMA 370). The battery pack can be charged several hundred times without significantly decreasing the capacity, no memory effect and constant power while in operation. Allows operation for long periods, just like a gas machine. Includes a charge level indicator with four LEDs for indicating the charge level. Rechargeable with STIHL charger AL 100 or AL 300.