This package includes 2 x 4.0ah BL1840 batteries and a twin pack of Makita DC18RC fast chargers offering the ability to charge 2 batteries simultaneously. The DC18RC charges 14.4v and 18v Li-ion batteries in 22 minutes . Features of the Makita DC18RC: The 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. When used in conjunction with charging adapter ADP03 this charger offers also the possibility of charging Ni-MH slide on batteries of 9.6V to 24V batteries. or when used with charging adapter ADP04 this charger offers the possibility to charge Ni-Cd and Ni-MH rod and block batteries of 7.2V to 18V batteries. DC18RC Charge Times Charge Time (1.5Ah): 15 mins Charge Time (3.0Ah): 22 mins Charge Time (4.0Ah): 36 mins Charge Time (5.0Ah): 45 mins Charge Time (6.0Ah): 55 mins Includes 2 x 4.0ah Batteries and 2 x DC18RC Fast Chargers