Fits most machines with 3 pin plug from 1998 and up. Polarity is also correct.
I used this battery for the CMOS on my 1998 Panasonic CF-M32 - It will also fit a Panasonic CF-M33. If you have one of these machines this is the CMOS battery you need. It's very hard to find info on these two machines so take my word for it.