The Mewryytuo DCB104 Power Tool Battery Charger is compatible with Dewalt 20V MAX Batteries (e.g., DCB205-2, DCB184, DCB240, DCB230, DCB207, DCBPS200, DCB204) and replaces Dewalt chargers like DCB118, DCB107, DCB115, DCB112, DCB102, DCB105, DCB119, DCB1104, DCB1102. With 100-240V AC input (global usability) and 12V-20V 12A DC output. It supports simultaneous charging via 4 battery ports, plus 2 USB ports (5V 2.1A) for small appliances. Built-in 6-layer safety protections (overvoltage, overcurrent, overpower, short-circuit, overheat, lightning) shield batteries from damage. Intuitive LED tracking lets you monitor status: flashing red = charging, solid red = fully charged, flashing red/yellow = abnormal temperature (check needed).