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System Overview 1-7
Figure 1-4. Battery Charge Gauge
NOTE: Figure 1-4 shows a main battery. For the secondary battery, the same
button and lights are present, but are located on top of the battery and can be
seen only when the secondary battery is out of the computer.
S
ystem Power
The
p
ower button controls
p
ower to the s
y
stem. The com
p
uter receives
p
ower
from either the AC ada
p
ter connected to an AC
p
ower source or from u
p
to two
batteries. If
y
ou use the AC ada
p
ter, constant
p
ower is available to the com-
p
uter. If
y
ou use one or two batteries, the s
y
stem has built-in
p
ower
mana
g
ement features that extend batter
y
life b
y
removin
g
p
ower from
p
arts of
the com
p
uter that are not bein
g
used.
Power Conservation
Attach the AC
p
ower ada
p
ter to the com
p
uter, whenever
p
ossible, to conserve
batter
y
p
ower. When the AC ada
p
ter is attached, the batter
y
is char
g
ed while the
com
p
uter uses AC
p
ower.
The Power Menu of the Setu
p
p
ro
g
ram has
p
ower conservation features. To
o
p
en the Main Menu of the Setu
p
p
ro
g
ram, Press <F2> durin
g
the boot
p
rocess.
When activated, each
p
ower conservation feature turns off or slows down one
or more functions while the com
p
uter is idle. The
p
ower conservation features
are as follows:
•
Standb
y
mode — To activate this feature, select the Standb
y
Time-Out
o
p
tion in the Power Menu of the Setu
p
p
ro
g
ram. To deactivate the feature,
move the cursor or
p
ress an
y
ke
y
on the built-in or external ke
y
board.
•
Save-to-RAM sus
p
end mode — To activate this feature,
p
ress <Fn><Esc>
or set the Sus
p
end Time-Out o
p
tion in the Power Menu of the Setu
p
p
ro-
g
ram. When save-to-RAM sus
p
end mode is activated, the icons c
y
cle
throu
g
h the ke
y
board indicators area of the status dis
p
la
y
p
anel. To deacti-
vate this feature,
p
ress the
p
ower button. The com
p
uter ma
y
take several
seconds to return to normal o
p
eration. Use the Resume On Modem Rin
g
o
p
tion in the Power Menu of the Setu
p
p
ro
g
ram to enable the com
p
uter to
automaticall
y
answer calls to external modems attached to the com
p
uter’s
serial
p
ort or to determine how lon
g
the com
p
uter remains in save-to-RAM
sus
p
end mode before resumin
g
normal o
p
eration.
indicator lights
status button