Samsung SGH-i270 User Manual page 30

The basics
To adjust the power setting:
1. On the Home screen, press the Start soft key.
2. Select Settings → More → Power Management.
3. Select the power settings:
4.
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In the Main battery option, you can check the
remaining amount of battery power.
In the Backlight time out option, you can select the
length of time the backlight is on. A backlight
illuminates the display and the keypad. When you press
any key or open the phone, the backlight turns on and
remains on for the backlight time-out period.
In the Display time out option, you can select the
length of time the main and sub LCD screen remains
on.
In the Display Brightness option, you can adjust the
brightness for the backlight on the screen.
In the Cpu Mode option, you can set the processor
speed for your Smartphone. Select the mode you want.
Press the Done soft key.