Hi Byrd,
Since no one else has responded, I’ll share what I did. On my 3400c I took out the PRAM and have kept it out so as to not have to worry about a replacement leaking down the road. And really, the PRAM battery isn’t necessary on this model. If you are lucky enough to have a working main battery, then even better news is that it will maintain all the settings that the PRAM batter would normally cover anyways (except, of course, holding sleep mode on while doing a quick main battery swap). I actually need to remove the PRAM battery in my 2400c and Clamshell iBook this weekend.
My opinion, keep the battery out. I have kept all my PRAM batteries removed as I get to them EXCEPT for my SE FDHD as I use it several times per month. My other ~10 vintage machines don’t get used enough to make resetting the clock on every boot a big deal.