Milwaukee M18/M12 18 volt Lithium-Ion 6-Port Rapid Charging Station 1 pc.The M18 & M12 Rapid Charge Station is the fastest charging solution in the industry. With the ability to charge 6 packs 4X faster, the station charges three batteries simultaneously. The charger accepts up to (3) M18 and (3) M12 battery packs, reducing the amount of time spent changing out batteries and increasing productivity on the jobsite. Featuring REDLINK Intelligence, the station communicates directly with the battery to monitor cell voltage,