Cmos bios battery (RTC Battery) are for HP 6910, 6545b, nc6400,
as well as for Dell Latitude E7240 (not OEM Model, rather compatible to 446400-001, 583289-001, GC02000WD00, or 254971-001 Compaq Armada 1500 & 5200 Series)

as well as for others that require a cable and 2 pin molex picoblade plug. This will work on other brands and models though it's not being listed for other variation model needs.

(Note: aftermarket alternative to the Original Equipment Manufacturer, not OEM, compatible to the Original RTC Battery)

The cmos bios battery being offered here are based on a 3 volt 210mah rating system board need, where what is required is a cable and 2 pin plug. The 2 pin plug is a Molex Picoblade 1.25 mm type that is fitted to a receptacle on the system board for it's integration.

The renewal or replacement process might be something that can be somewhat challenging depending on the specific model of notebook, yet in most cases technical manuals will allow the scope of it's replacement process and allow owners to replace and renew the cmos battery. If in doubt, please ask us to assist or redirect you to that source help.