User manual

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Power Saver Options
Go to [Settings] > [Battery] > [Power Saver Options] > [Sleeping Mode].
This feature can sense when you might be sleeping, and then switch to
Low Power Mode to make your phone more power-efficient.
High Performance Mode
Go to [Settings] > [Battery] > [High Performance Mode].
The system will operate in high performance mode, but it will increase
extra power consumption.