M28 REDLITHIUM Battery Pack. Get durability, runtime and power to complete the toughest jobs. The M28 Lithium-Ion Battery Pack is built to handle high-torque applications on the jobsite with ease. Managed by Milwaukee’s 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. Use this high voltage lithium-ion battery pack to power your Milwaukee M28 and V28 cordless power tools.