Tim R wrote:

I've had a Nikon 400 laser rangefinder for a number of years now, probably
10 to 12, something like that. We use it infrequently for measuring
distance - how far did that Frisbee throw or golf shot go, how far away is
that building, etc. It's very useful for sports, none of us hunt any
more.

Originally a battery lasted at least couple of years. CR2s are about $10
each, so that wasn't bad.

Now it's a couple of weeks. They seem to discharge when not being used.
Is that characteristic of an older electronic device, that it may develop
some small leakage current over time. I can leave the battery out until I
need it, but I'm curious.
I have a digital caliper that uses an MS76 cell. Seems to have the same
problem, battery used to last well over a year, now it lasts a few weeks,
maybe. I just take it out when not in use.

Jon