The Milwaukee battery charger is compatible with all Milwaukee M12 12V lithium-ion batteries 48-11-2401, 48-11-2440, 48-11-2460, 48-59-2420, 48-11-2430, 48-11-2411 and all Milwaukee M18 18V lithium-ion batteries 48-11-1862, 48-11-1880, 48-11-1850, 48-11-1852, 48-11-1812 This Milwaukee charger is a sequential charger and will take care of your batteries one at a time, devoting full charging power to each one. It supports 100-240V AC input and 10.8V-18V 3.0A DC Output. Can charge all Milwaukee 12V M12 and 18V M18 batteries in less than an hour Indicator lights show the status of the battery: charged, charging, and whether it needs maintenance or not. 2) The built-in safeguards of the charger will protect against overcharging, overheating & short-circuiting. 3) The build-in cooling system can cool the battery to produce more efficient work and optimize battery life.