I just purchased my watched earlier today. Upon unboxing, it says battery was low so I had to charge it while setting up. I charged it to 48% then I noticed it drained fast (2 hours at that). I thought Apple Watches survive for like a week with one charge cycle. Then when I got home I charged it again, after 30 minutes, it's full. Then after a few minutes of usage, it's already at 88% 😭 is this even normal?