Milwaukee M18B4 4Ah Battery Red Lithium-Ion

The Milwaukee M18B4 4Ah Battery Red Lithium-Ion features the most robust high-power cell technology with low impedance for optimal power delivery. It offers excellent cold weather performance down to -18°C, running 20% cooler than other Lithium-Ion technologies. The durable battery pack construction includes fuel gauge guide rails, hidden terminals, rubber over-mold, rigid metal cage, and three layers of shock absorbers. It integrates the Red Link (PLUS) System Management for single-cell management during top-charge and discharge, as well as optimized power output and usable capacity per charge. Compatible with all Milwaukee 18V chargers.