George, I guess I’m a geezer, too, and somehow am driving only about 3000 miles a year (in a 2011 Toyota Venza).
Replies here show you’re not the only one periodically charging the battery as preventive maintenance. I’ve had an old battery charger in the garage all this time, and it never occurred to me. (?) It’s occurred now, though, and is something I’ll start doing.
Thanks for your input.