Settings154AccessoriesChange the accessory settings.On the Settings screen, tap GENERAL → Accessories.• Audio output: Select a sound output format to use when connecting your device toHDMI devices. Some devices may not support the surround sound setting.• Automatic unlock: Set the device to unlock automatically when the cover is flippedopen.BatteryView the amount of battery power consumed by your device.On the Settings screen, tap GENERAL → Battery.• Show battery percentage: Set the device to display the remaining battery life.Power savingActivate power-saving mode and change the settings for power-saving mode. Refer to Powersaving feature for more information.On the Settings screen, tap GENERAL → Power saving.• Power saving mode: Activate power-saving mode and change the settings for power-saving mode.– Restrict all background data: Set the device to prevent apps that are running in thebackground from using a mobile data connection.• Ultra power saving mode: Extend standby time and reduce battery consumption bydisplaying a simpler layout and allowing limited access to an app.The estimated maximum standby time shows the time remaining before the batterypower runs out if the device is not used. Standby time may vary depending on yourdevice settings and operating conditions.