Original HP Compaq NC6400 65W AC Adapter ED494AA#ABA Power Cable includedTip with Centre Pin Specifications: Manufacturer: HP Model: 391172-001 Input: 100-240V, 50/60Hz Output: 18V 3.5A Tip Size 7.4/5.1mm Outer/Inner Diameter 13mm L Tip with Centre Pin Compatible Part No: 391172-001 384019-003 ED494AA#ABA PPP009H PPP009L PA-1650-02HC 384019-001 Compatible Models:NC2400 NC6400 NX6310 NX6315 NX6325 NX7400