I did something similar with my old 286 system. The CMOS battery failed and I rigged up a replacement using velcro and 4 AA batteries. Worked great.
Sadly I had to toss that system when I moved to a smaller apartment :(
Looking back, tossing it was a huge mistake.
Ebay has various 286s for about $200, some even working!
> Looking back, tossing it was a huge mistake.
On the other hand, being afraid of ending up with similar feelings like you, I keep stuff.
So I sit here in a room where I'm probably one or two arms-length away from VGA and DVI cables and other relics, "just in case".