Have you checked the voltage on your existing battery to confirm that it actually is out of spec before replacing it?
It's a good question, and the answer is no. I didn't want to remove the battery and lose date/time; and I assumed this would be an easier thing to do.
The plastic sealer around the battery reads 2032, but has a few other letters - I've since screwed the cover on again, so I don't know what the number is but can look later. It also had, what I assume to be, a date code, which read the year June or July 2010.
I know the battery hasn't been replaced since the laptop was purchased, and, since the time seems to change periodically, I figured for the $1 battery, I'd replace it; until I discovered it's not easy because it's "sealed".