My Apple Watch battery dies fast

i have a series 3 watch and the last few days mine has been doing the same. I’ve made sure it’s updates are up to date, I’ve reset it and it’s still not lasting a full day even without a workout.

Not sure what to do now!

Reset your Watch by pressing in the crown and side button until you see the Apple logo, then release both.

I purchased the series 5 and the battery is terrible. I take it off the charger around 7 and it’s dead way before 3pm.

Yes, we've read your post.

Same. Turned off always on screen. Brightness down and no listening set and it’s dead in 8 hours. No exercise or anything