The Milwaukee M12-18FC M12-M18 Rapid Fast Charger is perfect for charging your M12, M14 and M18 batteries packs quickly. It charges 2.0Ah, 4.0Ah, 5.0ah, 6.0Ah and 9.0Ah battery packs and can charge an M12 and M18 at the same time. Its REDLINK™ technology intelligently communicates