watchOS 9 may add a new low-power mode

If the power of Apple Watch drops to 10%, the user will be asked whether to enter "power saving mode". After startup, only the time can be seen and other functions cannot be used.

watchOS 9 will add a new “low power mode”. Different from the current "power saving mode", "low power mode" will not only lower the screen brightness and terminate unnecessary services, but also allows Apple Watch to run some applications, which is similar to the iPhone's "low power mode" to a certain extent.

watchOS 9 may expand “Atrial Fibrillation” health features to monitor how often a person is in atrial fibrillation over a specific period of time.

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