Cordless Battery Pack, Rechargeable, Lithium-Ion Battery, 4 Ah Battery, 18 VDC Charge, 90 min Charging, For Use With: Cordless Power Tool

Delivers upto 2X more runtime, 20 °F/-18 °C. Managed by Milwaukee® exclusive REDLINK™ intelligence, the battery features overload protection to prevent you from damaging your cordless power tools in heavy duty situations, while the discharge protection prevents cell damage. The temperature management system and individual cell monitoring help maximize battery life. Switch to the REDLITHIUM™ XC4.0 Extended battery pack to instantly upgrade the runtime and durability of your Milwaukee® M18™ cordless tools. Milwaukee® M18™ REDLITHIUM™ Cordless Battery Pack, Rechargeable, Lithium-Ion Battery, 4 Ah Battery, 18 VDC Charge, 90 min Charging, For Use With: M18™ Cordless Power Tool