I have a Series 5 that does everything I need just fine…except to last all day.

I get about 12-14 hours out of it, and 6am-6pm isn’t really what a human life looks like.

I feel like it used to go all day comfortably.

So, Can i replace the battery? Should I upgrade? Is a watch 9 going to be good enough, or should I go Ultra? Can I get a 7 or 8 and be fine?