Yes there is a cmos battery and it surely does sound like it's dead.

KC

From: "Billy Radio"
Subject: presario 2200 laptop time loss
Date: Sunday, February 06, 2005 6:20 PM

I have a presario 2200 laptop, 2months old, it will after being off a night
reset the time to 12 am jan 1 2004. does this unit have a cmos battery or is
the time onboard a chip. it certainly is too soon for a battery to fail. any
other reasons for such a failure, the battery is kept charged

--
Bruce
"paranoia is just reality on a finer scale"