Power

Battery packs
Power 7–15
Conserving battery power
Using the battery conservation procedures and settings described
in this section extends the time that a battery pack can run the
computer from a single charge.
Conserving power as you work
To conserve power as you use the computer:
■ Turn off wireless, and local area network (LAN) connections,
and exit modem software when you are not using it.
■ Disconnect external devices you are not using that are not
plugged into an external power source.
■ Stop, disable, or remove any external media cards you are not
using.
■ Use the fn+f9 and fn+f10 hotkeys to adjust screen brightness
as you need it.
■ Use the fn+f11 hotkeys to enable the Ambient Light Sensor,
which automatically adjusts screen brightness with regard to
the surrounding ambient light conditions.
■ Use optional powered speakers instead of the internal
speakers, or adjust system volume as you need it.
■ Press fn+f4 to switch the screen image from the computer
display to an external display device.
■ If you leave your work, initiate standby or hibernation, or
shut down the computer.