Center pin diameter: 1.65mmHP NX6100, NX8200 series:NX6100, NX6110, NX8200, NX8220HP NC6100, NC6200, NC8200 series:NC6200, NC6120, NC6140, NC8200, NC8230HP NW8200 Series: NW8200, NW8240 HP Compaq: NX6110, NC6110, NX6120, NC6120, NX8200 Series, NC8200 Series Compaq/HP Business Notebook: NC6110, NC6120, NC6140 Compaq/HP Business Notebook: NX6110, NX6120, NX6130, NX8220 HP Compaq Business Notebooks NC Series: NC6100 NC6110 NC6120 NC6140 NC6200 NC8200 NC8210 NC8220 NC8230 NC8240 NC8250 HP Compaq Business Notebooks NW Series: NW8200 NW8210 NW8220 NW8230 NW8240 NW8250 HP Compaq Business Notebooks NX Series: NX6100 NX6105 NX6110 NX6120 NX6130 NX8200 NX8210 NX8220 NX8230 NX8240 NX8250 HP Compaq HSTNN-105C