Enjoy the flexibility and convenience of having an extra 65W Smart-pin AC Adapter for your notebook, whether you're at home, in the office, or traveling. You can leave one at your desk and keep the other in your bag for quick plug-in. Added bonus: no more climbing under the desk to plug and unplug. Save energy: the Smart-pin technology reduces power consumption when the maximum adapter rating is reached Recharge the battery, whether the PC is on or off, when plugged in an electrical outlet Protect your system from surges with the built-in surge protector Warranty: one-year limited Compatibility: HP Pavilion: dv4, dv5, G3000, G5000, G60 and G6000 and G7000; Compaq Presario: CQ40, CQ45, CQ50, HP Compaq nc82xx, nw82xx, nx82xx, nx9000, 2510p, 2710p, 6510b, 6515b, 6710b, 6715b, 6720s, 6820s, 6910p, 8510p, 8510w, 8710p, 8710w, nc2400, nc4010, nc4200, nc4400, nc6120, nc6140, nc6220, nc6230, nc6320, nc6400, nc8230, nc8430, nw8240, nw8440, nw9440, nx6110, nx6115, nx6325, nx7300, nx7400, nx9420, nx9600, tc4200, tc4400b and others... Pin inside the tip of the ac adapter !!! (compare to your old adapter to ensure compatibility).