14• Set Turn off backlight if device is not used for to 30sec.• Set the backlight level to the 6th level.• Disable Auto-adjust backlight by battery level.2. Click Start > Settings > System > Power > Advanced > Sleepmode setting > On battery power• Adjust Turn off device if not used for to 1 min.• Enable Turn off device if not used for.3. If you will not use the device for a long time or at night, werecommend closing all tasks or applications, especially thosethat connect to the Internet.Please open the Task Manager from Start > Settings >System > Task Manager. Click End Task or Menu > End AllTasks.4. If you don’t need a data connection, we recommendturning off the Data Connection function in the Comm.Manager via Start > Comm. Manager.5. Turn off the backlight during calls by clicking Start >Preferences > Phone > Backlight off during call; set it to 10seconds.