It's not that bad, my battery lasts around 36 hours. I take it off when I go to shower and by the time I remember to put it back on (~30min) it's usually back to 90%+.

That's what I use. The Garmin O/S UX is a bit ass, but usable and I never need to carry money if I am going on a run.

"a bit ass" is a charitable way to put it, but same here, it's dependable, dead stable, good enough as a backup map.