The M18 REDLITHIUM-ION 5.0Ah Resistant Battery is built with a resistant housing, providing increased protection against exposure to common oils, greases, and solvents found in transportation maintenance and manufacturing environments. The M18 REDLITHIUM-ION 5.0Ah Resistant Battery delivers the same best in class performance as the standard M18 REDLITHIUM-ION 5.0Ah Battery. Each battery pack is durably built for heavy-duty use, runs cooler, and performs in cold weather climates. Built-in REDLINK Intelligence protects the battery from overloads, preventing you from damaging your cordless power tools in heavy-duty situations, while the discharge protection prevents cell damage. An integrated temperature management system and individual cell monitoring help to maximise the battery's life.