ALR Quad6: dead battery ?

Hi,

I bet there are some ALR Quad6 zealots in this newsgroup...

Here's my problem: My Quad6 started to act up today.

When it boots, it first displays
CPU = Pentium ??? Mhz

Then:

EISA Configuration NVRAM Bad - Run setup
....then after the mem check (which completes OK) I get:

SYSTEM BATTERY IS DEAD - REPLACE AND RUN SETUP
Real Time Clock Error.

So, where to begin? What could be wrong?.
And most important: WHERE is the battery (if any) on the Quad6 mobo? I
looked around and couldn't find anything resembling a battery.

Thanks,
Willy