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User’s Manual 6-5
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. It also maintains the system configuration.
If the RTC battery becomes completely discharged, the system loses this
data and the real time clock and calendar stop working. The following
message appears 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 pressing the F1 key.
Refer to Chapter 9 Troubleshooting for detail.
Care and use of the battery pack
The battery pack is a vital component of portable computing. Taking proper
care of it will help ensure longer operating time on battery power as well as
a longer life for your battery pack. Follow the instructions in this section
carefully to ensure safe operation and maximum performance.
Refer to the enclosed Instruction Manual for Safety & Comfort for detailed
precautions and handling instructions.
The computer’s RTC battery is a Ni-MH battery and should be replaced
only by your dealer or by a TOSHIBA service representative. The battery
can explode if not properly replaced, used, handled or disposed of.
Dispose of the battery as required by local ordinances or regulations.
The RTC battery does not charge while the computer is turned off even if
the AC adapter 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.
■ Use only battery packs recommended by TOSHIBA as replacements.
■ Charge the battery pack only in an ambient temperature between 5 and
35 degrees Celsius. Otherwise, the electrolyte solution might leak,
battery pack performance might deteriorate and the battery life might
be shortened.
■ Never install or remove the battery pack without first turning off the
power and disconnecting the AC adaptor. Never remove the battery
pack while the computer is in Standby Mode. Data will be lost.