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6-6
User's Manual
POWER AND
POWER-UP MODES
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 through an AC adaptor for an
extended period, 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
indicator may not indicate a low-battery condition.
Secondary battery (option)
An optional secondary battery can be installed in the Slim Select Bay to increase
your battery operating time. Note the caution on Standby mode in the previous
section Main battery.
CAUTION: The secondary battery pack is a lithium ion battery, which
can explode if not properly replaced, used, handled or disposed of.
Dispose of the battery as required by local ordinances or regulations.
Use only batteries recommended by TOSHIBA as replacements.
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:
**** RTC battery is low or CMOS checksum is inconsistent ****
Press [F1] key to set Date/Time.
CAUTION: 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.
NOTE: You can change the setting of RTC by pressing F1 key. Refer to
chapter 9 for the detail.