Acer Aspire V7-581 - Manual (Page 56)

56 - Power management
P
OWER MANAGEMENT
This computer has a built-in power management unit that monitors system
activity. System activity refers to any activity involving one or more of the
following devices: keyboard, mouse, hard disk, peripherals connected to
the computer, and video memory. If no activity is detected for a period of
time, the computer stops some or all of these devices in order to conserve
energy.
Disable Fast startup
Your computer uses Fast startup to start quickly, but also uses a small
amount of power to check for signals to start. These checks will slowly
drain your computer’s battery.
If you prefer to reduce your computer’s power requirements and
environmental impact, turn off Fast startup: