Over the last year or so I will get the "your clock is set to a date prior to 2008 etc" and other things are behaving funny.
Yes…that can be one indication of a weak/dead PRAM battery (if the computer had one). I think for the most part…most Apple laptops from the past few years (probably longer) have not used PRAM batteries. I believe that the technology is a capacitor on the logic board…that retains a charge for (I'm guessing) at least a few minutes while the battery is changed.
But…since Apple (since about 2010 or so) has designed notebooks with the technically non-user replaceable battery's (unlike older models that had the easily swapped out battery)…this capacitor "thing" may or may not still be in place. And even with some older Apple notebooks with the user replaceable battery…many of these didn't use a PRAM battery either.
So…since you are getting this message:
- What sort of condition is your battery in?
- Do you know how many charge cycles it has?
- Have you ever let the computer's battery go completely dead (0% charge)?
- Have you had any "power" issues with this computer?