Hi, For clearing the CMOS, you don't have to discharge the battery. Just remove it from its socket for a minute or two. Then put it back. Something like http://www.youtube.com/watch?v=cg_wvp1YdSI
Hello again ... and thanks for your help. I would like to do that; it sounds easy. HOWEVER, my battery (round, silver with blue edge) appears to be fixed in place. There is a clip over it which seems to be permanently fixed to the battery AND the two pins or leads from the battery are soldered in place. If I try to separate the clip, the two soldered pins will bend out of shape! Any comments there please mate?