Asus Eee PC 8G/Linux - Manual (Page 28)

3-6 Chapter 3: Getting Started
Power Mode
Your Eee PC is equipped with a smart power system. The power-
saving Battery mode lowers down the CPU frequency and decreases
the power consumption to maximize the battery life. The AC mode
enables the CPU to run at the full speed and to obtain the best
performance. When applying or removing the power adapter, the AC
mode and Battery mode will be shown on the display as a reminder.
Battery Mode AC Mode