There is no model number
NP-20 perhaps.....but I think that's what they're all called
That's a normal battery, not recharagable, right?
May be NP-20 is what I meant.
e.g. I have this silver oxide battery for my watch. It's called 377 by one manufacturer but is the same as SR626SW,606,RW329,37,280-39 and SR66 by other manufactureres.
Usually, on the package, there's a list of all the competitable one.