Ended up de-soldering the bad battery off this 4000T and replaced with one of these hooked to the motherboard's ready-to-go-connector:
http://www.radioshack.com/product/index.jsp?productId=2715445&kw=2715445+&sr=1&origkw=2715445 I also installed a SCSI CF card reader purchased from Mech (
www.a4000t.com).
Finally, I found that the CPU heatsink was alarmingly loose on this machine. I took the drive bay out and removed the heat sink. Bent the spring a bit so that it would make a tighter fit, cleaned the CPU/heat sink and applied some new thermal compound, and now it's tight as a glove.
I purchased a Dell ST2421Lb off of walmart.com ($199 new) which works pretty well so far with the 23-pin to VGA adapter.