BL1830 3.0Ah battery compatible with ALL 18V Li-Ion tools. DC18RC has a cooling fan and Active 3 Controls. This means that during the loading of the charging voltage, charging current, and temperature is held in the holes. The cooling system blows cool air into the battery. As a result, high temperatures occur in the battery, so that the battery life is extended, and the charging process is accelerated. Specifications: Voltage 18V DC18RC Charging times 18V Li-Ion 4.0Ah: 36 min / 3.0Ah: 22 min / 1.3Ah - 1.5Ah: 15 min DC18SE Automotive Charger 18V Li-Ion 4.0Ah: 90 min / 3.0Ah: 60 min / 1.3Ah - 1.5Ah: 30 min Batteries and Chargers Sold Separately. Material Type - Plastic & Metal