Charge Apple Watch
Set up the charger
In a well-ventilated area, place your charger or charging cable on a flat surface.
Your Apple Watch comes with the Apple Watch Magnetic Fast Charger to USB-C Cable (Apple Watch Series 7 only) or the Apple Watch Magnetic Charging Cable (earlier models). You can also use a MagSafe Duo Charger or Apple Watch Magnetic Charging Dock (sold separately).
Plug the charging cable into the power adapter (sold separately).
Plug the adapter into a power outlet.
Note: Fast charging is not available in all regions.
Begin charging Apple Watch
Place the Apple Watch Magnetic Fast Charger to USB-C cable (included with Apple Watch Series 7) or Apple Watch Magnetic Charging Cable (included with earlier models) on the back of your Apple Watch. The concave end of the charging cable magnetically snaps to the back of your Apple Watch and aligns it properly.
You hear a chime when charging begins (unless your Apple Watch is in silent mode) and see a charging symbol 
on the watch face. The symbol is red when Apple Watch needs power and turns green when Apple Watch is charging.
You can charge your Apple Watch in a flat position with its band open, or on its side.
If you’re using the Apple Watch Magnetic Charging Dock or MagSafe Duo Charger: Lay your Apple Watch on the dock.
If your battery is very low: You may see an image of the Apple Watch Magnetic Fast Charger to USB-C Cable or Apple Watch Magnetic Charging Cable and the low battery symbol
on the screen. For more information, see the Apple Support article If your Apple Watch won’t charge or it won’t turn on.
Apple Watch Series 7
Apple Watch Series 6
Apple Watch SE
Apple Watch Series 4 and Apple Watch Series 5
Apple Watch Series 3
WARNING: For important safety information about the battery and charging Apple Watch, see Important safety information for Apple Watch.
Check remaining power
To see remaining power, touch and hold the bottom of the screen, then swipe up to open Control Center. To more quickly check the remaining power, add a battery complication to the watch face. See Customize the watch face.
Prevent apps from refreshing in the background
When you switch to a new app, the app you were using doesn’t remain open or take up system resources, but it may still “refresh”—check for updates and new content—in the background.
Refreshing apps in the background can use power. To maximize battery life, you can turn this option off.
Open the Settings app
on your Apple Watch.Go to General > Background App Refresh.
Turn off Background App Refresh to prevent all apps from refreshing. Or scroll down, then turn off refresh for individual apps.
Note: Apps with complications on the current watch face will continue to refresh, even when their background app refresh setting is off.
Save power when the battery is low
You can put your Apple Watch in Power Reserve mode to stretch the remaining battery power. Your Apple Watch still displays the time, but you can’t use apps.
Touch and hold the bottom of the screen, then swipe up to open Control Center.
Tap the battery percentage, then drag the Power Reserve slider to the right.
Tip: If you have battery-powered devices such as AirPods connected to your Apple Watch through Bluetooth, their remaining charge appears on this screen.
When battery charge drops to 10 percent or lower, your Apple Watch alerts you and gives you the opportunity to enter Power Reserve mode.
When your Apple Watch is almost out of power, it enters Power Reserve mode automatically.
Tip: For tips on maximizing battery life, see Maximizing Battery Life and Lifespan at the Apple website.
Return to normal power mode
Restart your Apple Watch—press and hold the side button until the Apple logo appears.
The battery must have at least 10 percent charge for your Apple Watch to restart.
Check time since the last charge
Open the Settings app
on your Apple Watch.Tap Battery.
The Battery screen shows the remaining battery percentage, a graph that details the recent history of the battery charge, and information about when the battery was last charged.
Check battery health
You can find out the capacity of your Apple Watch battery relative to when it was new.
Open the Settings app
on your Apple Watch.Tap Battery, then tap Battery Health.
Apple Watch alerts you if battery capacity is significantly reduced, allowing you to check your service options.
Use optimized battery charging
To reduce battery aging, Apple Watch uses on-device machine learning to learn your daily charging routines so it can wait to finish charging past 80 percent until you need to use it.
Open the Settings app
on your Apple Watch.Tap Battery, then tap Battery Health.
Turn on Optimized Battery Charging.
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