User’s Manual 6-7
Power and Power-Up Modes

High capacity battery pack (option)

An optional High capacity battery pack is installable instead of a main
battery pack. The connection method of High capacity battery pack is the
same as that of main battery pack.

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 the 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.
■The 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.
■Do not remove the battery pack while the computer is in Standby
Mode. Data is stored in RAM, so if the computer loses power it will be
lost. When the computer is powered off in Standby Mode, and the AC
adaptor is not connected, the main battery pack and optional 2nd
battery pack supply power to maintain data and program in memory. If
the battery pack is completely discharged, Standby Mode does not
function and the computer loses all data in memory.
■When the High capacity battery pack is connected to the computer, do
not hold on only to the High capacity battery pack when lifting the
computer up.
The High capacity battery pack may separate from the computer,
causing it to fall and cause injuries.
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.