Wake the Apple Watch by tapping the screen or raising your wrist
Swipe up from the bottom of the watch face to open Control Center
Check the battery percentage shown on the battery icon
Tap the battery percentage to open the Battery screen
View the current battery level and Low Power Mode status
Add the Battery complication to your watch face for quick access
On iPhone, open the Watch app
Tap My Watch, then tap Battery to view battery-related settings and status