Smart charging capability for all Kobalt 40-volt Lithium ion batteriesUsed for charging KB-240 and KB-440 batteries Charges 2.0-Ah battery in 60 minutes Charges 4.0-Ah battery in 120 minutesVisual charge status indicatorCan be used bench top or mounted on the wallInitial no-load voltage, when fully charged, peaks at 40 volts; nominal voltage under typical load is 36 volts