HTC U Ultra‎

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Why are Power saver and Extreme power saving mode both grayed out?

This happens when you turn on High performance mode under Developer options in Settings.

High performance mode requires additional battery power to maximize CPU performance. In this mode, both the Power saver and Extreme power saving mode features won't be available. If you want to use these features, turn off High performance mode.

Note: Power saver mode may not be available on phones sold by certain operators.
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