I confess to spending a considerable time after placing my order looking at all their other stuff and thinking "That's a fantastic gizmo...maybe I should get one of those. Oooh. And that. And maybe that too...."
Will change the battery and see what happens, but I'd be surprised if it makes any difference. Would the CMOS battery dying cause the PC to hang after it had booted? I know it can mess up settings and times dates etc..