The Milwaukee M18 B5 18v Cordless Li-ion Battery is a high-performance battery pack designed to power Milwaukee's M18 range of power tools. With a capacity of 5ah, this battery delivers long-lasting power and runtime, allowing you to work for longer periods without having to stop and recharge. Built with Milwaukee's advanced Redlink Intelligence technology, the M18 B5 Battery optimizes the performance of your tools, providing superior power and runtime while also protecting against overloading and overheating. This technology also helps extend the life of the battery, ensuring it maintains its performance over time. Features & Benefits • Can be used in temperatures down to -20°C without compromising on runtime and battery life • Durable metal frame battery construction with shock responsive separators preventing pack failure • Individual cell monitoring ensures optimal charge and discharge for maximum life • On-board battery fuel gauge helps the user to maximize his battery run-time ef