> With 36 hours being the absolute best-case scenario for battery life, it would seem your options are to either have two watches, or be perfectly fine only wearing your watch every other day?

That only makes sense if you think it takes 12+ hours to charge. 20 minutes on the charger in the morning while I'm taking a shower and getting dressed and it's fine for the next 24 hours. Oh no, I can't wear it in the shower. I wasn't going to anyways.