I had an Apple Watch Series 6 for about five years and the battery degraded to the point it needed just about two charges a day.

Then I found out about the new Fitbit Air in June and picked one up. Advertised battery life is 7 days; I tend to get closer to 6. It does the sleep/activity tracking I want (though not quite as good as the AW if I'm honest).

The extra benefit is I've cut out smartwatch features from my wrist. I got tired of having notifications on a watch and rarely needed special apps or anything either. I really only used the AW for telling time, date, temp/weather conditions, and payments; but most of the time I have my phone or I'm near a computer anyway.