Now let's see the battery life capabilities with one watch for sleep tracking and the other for everything else. SE and AU Watch combo. : r/ AppleWatch
Best best sleep tracking apps for Apple Watch - 9to5Mac
How the Apple Watch tracks sleep -- and why - CNET
Apple is adding sleep tracking to Apple Watch, but what about the battery life? | ZDNET
watchOS 7: Hands-on with native Apple Watch sleep tracking - 9to5Mac
Sleep Tracking in Apple Watch Might Be Useless Unless Battery Life Is Improved - Rapid Repair
Apple Watch sleep-tracking doesn't need to exhaust your battery- 9to5Mac
This is the single best thing about the Apple Watch Series 7 | BGR
A guide to Low Power Mode on the Apple Watch | TechCrunch
Apple Watch sleep tracking in watchOS7 made me a believer — here's why | Tom's Guide
When do I charge my Watch? — SleepWatch
The Apple Watch Doesn't Need Sleep Tracking Until It Gets Better Battery Life
I tested Apple Watch sleep tracking to save you time and battery life | VentureBeat
Apple Watch sleep tracking: how to use it, battery life, your sleep data and more | TechRadar
Sleep Tracking in Apple Watch Might Be Useless Unless Battery Life Is Improved - Rapid Repair
Apple Watch sleep tracking: How does it work? - BusinessToday
The Apple Watch Doesn't Need Sleep Tracking Until It Gets Better Battery Life
A guide to Low Power Mode on the Apple Watch | TechCrunch
The Apple Watch Doesn't Need Sleep Tracking Until It Gets Better Battery Life
How to Track Your Sleep on Apple Watch | PCMag
Apple Executives Discuss watchOS 9's New Health Features Like AFib History and Tracking Your Sleep Stages - MacRumors