36 Mobile computing
RG 5.375 x 8.375 ver 2.3.3
Slim SelectBay, or carry additional charged battery packs
with you.
The computer also has an internal real-time-clock (RTC)
battery. The RTC battery powers the RTC memory that stores
your system configuration settings and the current time and
date information.
The RTC battery does not charge while the computer is turned off,
even when AC power is attached.
Monitoring battery power
The computer’s main battery light gives you an indication of
the main battery’s current charge:
❖Green indicates the AC adapter has fully charged the
battery.
❖Amber indicates the AC adapter is charging the battery.
❖Off indicates that the battery is not being charged.
Battery life and charge time may vary depending upon power
management settings, applications and features used.
❖Flashing amber indicates that the computer is using
battery power, and the battery’s charge is running low.
HINT: Be careful not to confuse the battery light ( ) with the on/off
light ( ). When the on/off light flashes amber, it indicates that the
system is suspended (using Windows® XP Standby command).
Setting battery alarms
Your computer can be configured to warn you when the
battery is running low. For more information, see “What to do
when the battery alarm sounds” in the electronic user’s guide.
Changing the main battery
When your battery power is running low, you have two
options: connect the computer to an AC power source or
install a charged battery.
If your battery discharges fully, your information will be lost. Be sure
to save your work often.