How long should I charge my apple watch
Apple Watch Sleep – How to Charge for Use in Sleep Tracking
I want to track sleep with my Apple Watch; but, when do I charge it?
The good news is that you can still wear your Watch for the majority of the day while still getting the advantage of using it to monitor sleep at night without having to worry about your battery dying. The key is to develop the proper daily charging routine.
Let’s get this party started with some fundamentals. According to Apple [1,] charging an Apple Watch battery from 0% to 80% takes 90 minutes. Furthermore, Apple  claims that with normal use, the Apple Watch battery can last around 18 hours.
SleepWatch, our app that automatically monitors your sleep habits in the background, does not add a substantial drain on battery life, based on our own experience and user feedback.
This means that if you charge your Apple Watch for around 60 to 90 minutes a day, you should be able to keep the battery charged for around-the-clock wear ability when using it throughout the day and at night to monitor your sleep.
What time should I charge my apple watch ?
Do you want to Know how long you should charge you apple watch? Read below carefully.
We suggest dedicating 60 to 90 minutes every evening before bed to charge your Watch, based on our own experience and input from Sleep Watch users. If you usually go to bed at 10:00 p.m., for example, we recommend starting to charge your Watch at 8:30 p.m. or 9:00 p.m. before putting it back on your wrist for sleep. Some users tend to charge the Watch for 30-45 minutes in the morning while getting ready or showering, and another 30-45 minutes in the evening before going to bed.