Smaller and lighter than Ni-Cd compact batteries, yet delivers long runtime and fade-free power. The M12™ REDLITHIUM™ battery is designed with great 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 Ni-Cd batteries and offers 1.5 Ah of runtime. With built-in Milwaukee® durability, it runs cooler and performs in climates below 0 deg F/-18 deg C. 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.