How do I track the battery life of my Apple Watch?

To track the battery life of your Apple Watch, follow these quick steps based on the provided search results:

Monitor Battery Percentage at a Glance:

1. View directly on your Apple Watch: Swipe up to reveal Control Center (for watchOS 9 or earlier, touch & hold the bottom of the screen and swipe up). A battery icon displays the remaining percentage. Some watch faces allow adding a customizable battery complication too.

2. Use Nightstand mode display: When your Apple Watch is charging horizontally and in Nightstand mode, you can tap to look at the battery percentage.

Access Detailed Information About Charge Level and Usage:

3. Open the Settings app on your Apple Watch: Navigate to Settings > Battery to get insights such as the current battery level and charging history graphs.

Additionally, you can keep an eye on both current charge levels for any connected Apple Watch(es) through the iPhone's battery level widget, and learn about Apple Watch's Optimized Battery Charging mine how iOS records daily usage for improving battery longevity. Note that there is currently no direct way to see individual app's energy consumption on the Apple Watch.

For checking the overall maximum battery health, refer to the following instructions:

View Maximum Battery Capacity (Health):

1. Access your Apple Watch Settings by opening the app drawer (by clicking the Digital Crown), heading towards the Setting cogwheel icon.
2. Choose the Battery option within Settings, followed by selecting Battery Health. This section provides a readout showing the battery's present maximum capacity relative to its original state.

Keep in mind that while realistic assessments of battery runtimes change depending on factors like frequent usage, GPS activity, and different watch-models, Apple officially indicates a range from 18 hours for Series 7, Series 8, and Series 9; to approximately 32 hour run times with up to 72 hours under special modes with Apple Watch Ultra series.