The Milwaukee M12 B4 12v Cordless Li-ion Battery is a high-performance power source designed for use with the M12 range of power tools. With its impressive 4ah capacity, this lithium-ion battery provides an extended run time and improved performance over its predecessors. The M12 B4 battery features Redlink Intelligence technology, which optimises performance and prevents overload or overheating. This technology also enables communication between the battery and tool, ensuring maximum efficiency and prolonging the lifespan of both components. The battery's compact and lightweight design makes it easy to handle and transport, while its durable construction ensures it can withstand the toughest job site conditions. The M12 B4 battery is compatible with all M12 power tools, allowing you to power a wide range of tools with a single battery. Features & Benefits • Can use in temperatures down to -20°C without compromising on runtime and battery life • Discharge protection prevents cell damage from over-discharge • Individual cell monitoring ensures optimal charge and discharge for maximum life • Integrated welded frame battery construction with shock responsive separators • Redlithium protection with Redlink digital overload protection • Up to 2x run time, 20% power and 2x more battery life compared with other Li-ion technologies Specifications • Battery Capacity: 4ah • Battery Type: Milwaukee M12 Lithium-ion • Battery Voltage: 12v • Pack Quantity: 1 • System: M12 • Weight: 0.4kg