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This 330W high-power AC adapter provides stable 19.5V 16.9A output, precisely matching Dell Alienware M18x original power supply parameters. Compatible with part numbers XM3C3, ADP-330AB B, DA330PM111, LA330PM160, and AW17R4-7345SLV, it serves as a reliable replacement for Alienware M18x, M18x R1/R2, 17 R4, X51, and other high-performance models. The 7.4×5.0mm connector ensures a secure fit. Featuring a fire-retardant shell and high-efficiency components, it delivers consistent power during intense gaming. Universal 100-240V input supports global use, while comprehensive safety protections prevent device damage. An ideal replacement or backup power solution for Dell gaming laptops.