Smaller and lighter than NiCd compact batteries, yet delivers long runtime and fade-free power. The M12 REDLITHIUM battery is designed with superior pack construction, electronics and performance to optimize work per charge and work over pack life on the jobsite. This battery is 65% lighter and 50% smaller than compact NiCd batteries and offers 1.5 amp-hours of runtime. With built-in Milwaukee durability, it runs cooler and performs in climates below 0F/-18C. 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 durable battery to power your Milwaukee M12 cordless power tools.