This was asked before, the battery and its spec are
described here.
Unfortunately the question whether it's the same battery in M96 as in M92 remained unanswered. I was going to check but the battery, at least in my unit, is very well stuck in place and I didn't have guts to pry it off its bay as the package bends easily. Perhaps someone with a dead M96 could check the model number
I also happen to have a spare brand new M92 battery. If you live in UK and need one PM me and I will post it to you free of charge (or for a pint if you live close

).