Makita 2x 3.0Ah 18v LXT Li-Ion Batteries BL1830 and DC18RC Fast Charger The DC18RC has a cooling fan and Active 3 Controls. This means that during the loading of the charging voltage, charging current, and the 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. The Makita 18v 3.0Ah Lithium-Ion battery contains high energy density technology. Being Lithium-Ion, the BL1830B has no memory effect and is much lighter than other battery chemistries. 22 minute re-charge in DC18RC charger as well as battery capacity indicator LED's which show you how much power you have left at the touch of a button. Fits all Makita 18v LXT Li-Ion tools with Makita 'Star' technology so if your tool also has a 'Star' you can be assured of battery protection. The Li-ion range delivers 430% more working capacity during it's lifetime compared to