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User’s Manual 6-6
Power and Power-Up Modes
Real Time Clock (RTC) battery
The Real Time Clock (RTC) battery provides power for the internal real time
clock and calendar function and also maintains the system configuration
while the computer is turned off. If the RTC battery becomes completely
discharged, the system will lose this information and the real time clock and
calendar will stop working - in this instance the following message will be
displayed when you turn on the power:
S **** RTC battery is low or CMOS checksum is
inconsistent ****
Press [F1] key to set Date/Time.
You can change the Real Time Clock settings by turning the computer on
while pressing the ESC key and then the F1 key when prompted. Please
refer to Chapter 8 Troubleshooting for further information.
Care and use of the battery pack
This section provides the important safety precautions in order to handle
your battery pack properly.
Refer to the enclosed Instruction Manual for Safety and Comfort for
detailed precautions and handling instructions.
The RTC battery does not charge while the computer is turned off even if
the AC adaptor is attached.
■ Make sure the battery is securely installed in the computer before
attempting to charge the battery pack. Improper installation could
generate smoke or fire, or cause the battery pack to rupture.
■ Keep the battery pack out of reach of infants and children. It can cause
injury.