How to turn power saving mode on and off on my Huawei P10

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Power saving mode (extended standby mode) optimizes battery life on your Huawei P10. When the screen is off, your phone will save power by lowering the screen brightness, turning off haptic feedback and limiting the phone's performance. You will still receive messages and notifications.
1. Swipe left.
2. Touch Settings.
3. Scroll to and touch Battery.
4. Touch Ultra to limit the phone to using only calls, messages and contacts.

Power saving mode is for daily use.
5. Read the warning and touch ENABLE.
6. Power saving mode is now on. Touch the Exit icon.
7. Touch EXIT to turn off the power saving mode.