Power Saving Mode Save battery power by limiting the device's functions. On the Home screen Tap Apps — Settings —, Battery —, Select Power saving mode Tap the switch to activate it. To automatically activate power saving mode when the remaining battery power reaches the preset level, tap Start power saving and select an option. Ultra Power Saving Mode Use this mode to extend the device's battery power. In ultra power saving mode, the device performs the following: Displays colours on the screen as grey tones. Restricts the available apps to essential and selected apps only. Deactivates the mobile data connection when the screen turns off. Deactivates the Wi-Fi and Bluetooth features. On the Home screen: Tap Apps —, Settings —, Battery —, Select Ultra power saving mode Tap the switch to activate it. To deactivate ultra power saving mode, tap MORE —* Disable Ultra power saving mode. The usage time left shows the time remaining before the battery power runs out. Usage time left may vary depending on your device settings and operating conditions.