The M12 REDLITHIUM 3.0 Ah compact battery pack features superior pack construction, electronics and performance to deliver more work per charge and more work over the life of the pack. With Milwaukee durability built in, this battery runs cooler and performs in climates below 0°F/-18°C. Its compact design fits in tight work spaces and reduces user fatigue. 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.