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By certification 
18.5V 3.5A 65W Original Laptop Power Adapter For HP Laptop ,7.4*5.0 mm connector ,Laptop Ac Adapter, Laptop Charger
E.replace the following part numbers:
ED494AA#ABA, 391172-001, 384019-003, PA-1650-02HC, 384019-001, 384021-001, 391173-001, 384020-001,
384020-003, 409992-001, ED495AA, PA-1900-18H2, PPP014L-SA, 384019-002, 384020-002,381090-001
fit Machine Models:
nc6400,nc2400,nc4400,nc6320,
HP Compaq Business Notebook NW Series:nw8440,nw9440,
HP Compaq Business Notebook NX Series:
nx6310,nx6315,nx6320,nx6325,nx7300,nx7400,nx8420,nx9420,nx7400
HP Compaq Tablet PC TC Series:
tc4400 (the models with 65W adapter),
HP Compaq Notebook PC:
Mini-2133,2533t Mobile Thin Client,510,530,
2230s,2510p,2710p,6510b,6515b,6530b,6535b,6710b,6715b,
6720s,6720t Mobile Thin Client,6730b,6730s,6735b,6735s,
6830s,6910p,8510p,8510w Mobile Workstation,8710p,8710w Mobile Workstation,
HP Compaq Presario Series:
CQ40,CQ45,CQ50,CQ50-100,B1210,
E.replace the following part numbers:
ED494AA#ABA, 391172-001, 384019-003, PA-1650-02HC, 384019-001, 384021-001, 391173-001, 384020-001,
384020-003, 409992-001, ED495AA, PA-1900-18H2, PPP014L-SA, 384019-002, 384020-002,381090-001
fit Machine Models:
nc6400,nc2400,nc4400,nc6320,
HP Compaq Business Notebook NW Series:nw8440,nw9440,
HP Compaq Business Notebook NX Series:
nx6310,nx6315,nx6320,nx6325,nx7300,nx7400,nx8420,nx9420,nx7400
HP Compaq Tablet PC TC Series:
tc4400 (the models with 65W adapter),
HP Compaq Notebook PC:
Mini-2133,2533t Mobile Thin Client,510,530,
2230s,2510p,2710p,6510b,6515b,6530b,6535b,6710b,6715b,
6720s,6720t Mobile Thin Client,6730b,6730s,6735b,6735s,
6830s,6910p,8510p,8510w Mobile Workstation,8710p,8710w Mobile Workstation,
HP Compaq Presario Series:
CQ40,CQ45,CQ50,CQ50-100,B1210,