The DC40RB is a 110V Twin Port Fast Charger, designed for charging battery ranges from 14.4V LXT to 40V Max XGT; ADP10 Interchangeable Adapter Set is required (not included) to charge 14.4V and 18V LXT batteries. The DC40RB is not compatible with G-Series range of batteries. The DC40RB is able to charge two Makita 40V Max Li-ion XGT batteries at the same time as fast as a DC40RA charger charges one battery. The DC40RB performs consecutive fast charges of batteries for increased convenience and features optimum charging control using feedback of real-time battery data. DC40RB is equipped with large charging status indicator light, selectable melody sound for full charge notification, two cooling fans; one for the battery and the other for the charging circuit and electronic current limiter for overload protection. Specifications • 45 minutes to charge BL4040 40V Max 4.0 Ah • 28 minutes to charge BL4025 40V Max 2.5 Ah • 22 minutes to charge BL1830B • 29 minutes to charge BL1840B • 35 minutes to charge BL1850B • 50 minutes to charge BL1860B Features & Benefits • Twin port fast charger for charging battery ranges from 14.4V LXT to 40V Max XGT • Able to charge two Makita 40V Max Li-ion XGT batteries at the same time • Equipped with two cooling fans, one for battery and other for charging circuit • Able to perform consecutive fast charges of batteries for increased convenience • Large charging status indicator light • Electronic current limiter for overload protection