All 3 batteries should be 357's. Someone probably put the A76 in there because he had it lying around and didn't want to spend the money for another 357. I have a lot led watches myself including an HP-01, but I have to say that overall it's my favorite. It never ceases to amaze me how they were able to cram so many features in there.
Regards,
Jon
P.S. Cool name.
