There is an option in the Watch app on the phone (what?). Look under Sleep for “charging reminders”. It will give you a reminder on your phone just before bedti

There is an option in the Watch app on the phone (what?). Look under Sleep for “charging reminders”. It will give you a reminder on your phone just before bedtime and you can use that time to charge it up before sleep tracking. It gives you the reminder no matter what charge level it is at.