I have the SE and can wear it for 2+ days without a proper charge if I just charge it when I shower in the evenings. :)

Only got 5 hours of sleep tonight with 1h 40 mins of deep sleep. Pretty good! Average is an hour and five.

Go to the apple store, they will charge it and it should ping on the owners find my. Then hold down on the button, not the dial, the button and it’ll come up with medical ID. Then you have their info to contact them.