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User’s Manual 6-5
Power and Power-Up Modes
P
OWER
AND
P
OWER
-
U
P
M
ODES
The battery recharges the RTC batteries. The battery maintains the state of the
computer when you enable Resume.
To ensure that the battery pack maintains its maximum capacity, operate the
computer on battery power at least once a month until the battery pack is fully
discharged. Refer to Extending battery life in this chapter for procedures. If the
computer is continuously operated on AC power, more than a month, the battery
may fail to retain a charge. It may not function efficiently over the expected life
of the battery and the Battery LED may not indicate a low-battery condition.
Real time clock 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:
Check system. Then press [F1] key . . . . . .
When the computer is powered off in Resume mode, and the AC
adaptor is not connected, the battery pack supply power to
maintain data and programs in memory. If the battery pack is
completely discharged, Resume does not function and the
computer loses all data in memory.
The following message appears when you turn on the power:
ERRPR 0271:Check date and time set-
tings.
WARNING 0251:System CMOS checksum
bad - Default configuration used.
Press <F1> to resume, <F2> to Setup.
The computer’s RTC battery is a lithium ion 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.