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All-day battery life is based on 18 hours with the following use: 90 time checks, 90 notifications, 45 minutes of app use, and a 30-minute workout with music playback from Apple Watch via Bluetooth, over the course of 18 hours.
If your battery power is low, you'll see on the screen of your Apple Watch. To charge your Apple Watch: 1  Plug the Apple Magnetic Charging Cable into its USB Power Adapter.2  Plug the adapter into a power outlet. 3  You can also plug the charging cable into a USB port.f your battery power is low, you'll see on the screen of your Apple Watch. To charge your Apple Watch: 1  Plug the Apple Magnetic Charging Cable into its USB Power Adapter.