This Milwaukee 18V Lithium-Ion Battery works on the M18 Cordless Tool System and has 1.5 Amp Hours of run-time. This battery powers over 40 Milwaukee M18 cordless tools. The M18 Compact RED LITHIUM battery offers less weight and a reduced size than the M18 XC

High Capacity RED LITHIUM battery pack to reduce user fatigue. Managed by Milwaukee's exclusive REDLINK Intelligence, the battery features Overload Protection, a Temperature Management System, Individual Cell Voltage Monitoring, Discharge Protection and a Battery Fuel Gauge.