You've got me curious, how many is more F2's than any sane person should have? 🙂
I had the photomic version. I don't remember much about the battery, it seemed to last forever since it only powered the meter so I gave it very little thought over the time I had it.
I miss that camera. In the late 90's, I traded it when i got seduced by autofocus and I still regret that. I really don't know that I'd have the patience for manual focus anymore, but I should have at least kept the camera long enough to find out. To this day, I still feel like I'm missing out with a G series lens even though it's been over 20 years since I needed an on-lens aperture ring.
I have photos I took over 30 years ago and I still vividly remember taking them because I remember spending the time focusing and composing the image. It takes me right back to the moment I was there. Pictures I take recently have so little meaning or feeling for me by comparison just because they are so easy.
I think I was at a dozen or so the last time I bothered to count.
I started with a pair of Photomics-one black and one silver, then "migrated" to the F2A, which is essentially a Photomic that works with AI lenses. I've added a few more F2As and F2 Photomics along the way.
Then you get into the "fancy" ones where the meter display uses LEDs rather than a needle(not unlike the FM or FM2). The first of these was the F2s, which is non-AI(twiddle the aperture ring) and you have two LEDs, a + and -. When they're both lit exposure is "correct." The F2sb switched to the 3 LED + 0 - display, which gives you a lot more information(two LEDs lit=1/2 stop over or under). These also have a crazy sensitive silicon photodiode and can meter out to 10 seconds and I think down to LV -2(there's a semi well known trick to get timed shutter speeds 2s-10s on the F2 using the self timer, the B setting on shutter speed dial, and the T setting on the shutter release lock). You have the F2AS which is the same as the F2sb but for AI lenses. Finally, there's the surpisingly difficult to find F2 with a plain prism-I actually found my prism separately, stuck on an F motor drive body. I wanted the F motor body anyway(they required factory/technician fitting), so of course bought it, stuck a spare Photomic FTN finder on it(with another back story as to how it got to be a "spare") and put the F2 prism on an F2 body I had that came with my SB finder but had flaky electrical connections that made the meter sometimes not work.
Of the above, the F2sb is probably the least common. It was made for 2 years and was super expensive new. I love mine, and it's my main F2 I use-I like the SB meter since it works equally well non-AI lenses as well as AI lenses with a metering fork(which is most manual focus Nikkors). The F2AS is the one everyone wants, and I paid $500 for mine with an MD-2 motor stuck to the bottom of it.
So that's my F2 collection-they're not only a virtually perfect camera to use with all the features you need and none that you don't, but also have seemingly no end of accessories, are indestructible, and between the easy dating and all the extra stuff they are fun to collect. As a camera to use, I'll take an F2 any day of the week over an F3. The F2 is basically all the annoying things about the F made right, but without making stuff too complicated.