Resurrecting and old thread... I've been thinking about using the ML-2032 batteries on my upcoming board fixes rather than the CR-2032. Did you do yours, and how has it worked out if you did?
I used an ML2032 on my Apollo 1240 turbo card, see photo below:
http://www.amiga.org/gallery/index.php?n=3652I can't tell you any more than that though (I tested it for 4 weeks and it kept perfect time) because I dismantled the machine and stored it away and haven't used the card since!
My Apollo 1260 doesn't have a battery in yet, although I did remove the old leaking battery last year... I wish I had more time for my Amiga's!!!!