Does the 2008 Aluminum Unibody MacBook (A1278) have a PRAM (CMOS) battery?

I have a 2008 Aluminum Unibody MacBook (A1278) 2.0 GHz that I purchased back in 2009. I am currently running OSX 10.6.8 Snow Leopard. It has worked basically flawlessly thus far, however, yesterday when I booted it up, my computer "forgot" the current date (it was showing a Jan 1 2000 date). It also forgot my Wifi information, asked permissions for several items including krb5kdc. I reset the clock to the correct time (and decided to not link the time/date with the Apple server), accepted all permissions, and the computer then behaved normally.

From my several years of PC repair experience, when you see something like that, the first thing you think is that the CMOS battery is dying, which was the first thought that occured to me. However, in looking up CMOS (or PRAM) information, I found very little on my model. The stuff I did find gave me the impression that this model doesn't have a CMOS or PRAM battery.

For those that have had this issue, or know what may be causing it, what is the best remedy? Is there a clock battery that I can replace? Would resetting PRAM or SMC fix the issues? If it IS a PRAM battery issue, I don't want it to bite the dust before I have the opportunity to replace it. Suggestions please?

Thanks,

Kimber