Available alone or in 18V LXT® Lithium-Ion tool kits. 18 V Li-Ion battery models BL1820B, BL1840B, and BL1850B feature respective capacities of 2.0, 4.0, and 5.0Ah and full-recharge times of 25, 40, and 45 min. Products are compatible with Star Protection tools as indicated by Star Symbol™ and/or Yellow Battery Receiver under tool. Delivering consistent power and run time in temperatures down to -4°F, batteries resist self-discharge and are compatible with Makita Rapid Optimum Charger.