Defines the amount of time the screen stays on as long as there is no keypad or scanning activity on the computer. This setting significantly affects the life of the battery. If you set a longer screen turns off after value, you will use the power in the battery at a faster rate.
Options for Screen Turns Off After may include Disabled, 1 minute, 2 minutes, 3 minutes, 4 minutes, 5 minutes, 6 minutes, or 11 minutes depending on your computer.
1 minute (all other computers)
Disabled (70 Series, CN50, CS40, CV30)
Device Settings > Battery Power > Screen Turns Off After