Did you order it off that going out of buissness ad on CL?
I also need to get a PRAM battery. If I flip the switch, I'll get the boot chime, but no HDD activity. If I flip the switch, wait 3 seconds for the chime, back off, back on, I'll get quite abit of HDD activity and a double chime. At least Apple was smart to use a half height AA. I need to order some to keep on hand.