Here I am again (14 years later), searching for a tech answer and finding that over a decade ago I asked the question and info was given leading to a solution. There needs to be a word for that -- it's happening to me more and more (usually I find traces of my earlier questions on the Usenet, though.)
At ANY rate, since this post I've twice replaced the battery in my Amiga 2000. Most recently it was a very large 3.5v pack with huge mAh rating, but it did the job (built by Batteries Plus for me).
So, again I need to replace this battery. I've got it run a distance from the mobo with cables and I just solder the new onto the cables and keep it hanging under the plastic faceplate -- leak away, battery, 'tis no matter!
SO -- Batteries Plus has in stock a small 3.6v NiCAD with 400mAh. I see the original A2000 clock battery was 3.6v NiCAD with 80mAh. I just wanted to get opinion here (it's been a while since I get into this) that I should be fine with that much higher mAH. I am sure the current large 3x1.2pack has even higher than that --- and it might be a NiMH, I can't recall for certain.
Thanks for confirming or dispelling. Cheers.
Edit: I am aware of the coin-cell motherboard mounted kits that make the swapout easier. I'm not interested in that - I've got these cables run and soldering new batteries to them every 4 years is a breeze.
bp