The Milwaukee M18 5.5 Ah Li-ion battery offers professionals maximum performance and longer runtime for all M18™ tools. Thanks to advanced technologies, this battery delivers more power, better protection, and a longer lifespan under demanding conditions. Special features: Compatible with all M18™ tools in the range. Individual cell monitoring for optimal charging and discharging, maximizing battery lifespan. Integrated fuel gauge for efficient runtime management. Durable metal construction with shock-responsive separators prevents failure from drops or vibrations. Operates up to 50% cooler than other M18™ REDLITHIUM-ION™ batteries in heavy-duty applications. REDLINK™ intelligence protects the battery pack from harsh jobsite conditions. New HIGH OUTPUT™ technology offers up to 50% more power compared to standard M18™ REDLITHIUM-ION™ batteries. Technical data: Battery capacity: 5.5 Ah Weight: 1.1 kg Voltage: 18 V System: M18 Battery type: Li-ion Charging time: M12-18 AC charger: 130 min M12-18 C charger: 115 min M12-18 FC charger: 60 min M1418C6 charger: 125 min Standard delivery: 5.5 Ah battery