Toshiba Satellite R20 User Manual page 157

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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 battery pack supplies power to maintain
data and programs in memory. If the battery pack is completely
discharged, Standby Mode will not function and the computer loses all
data in memory.
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
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.
Slice Expansion Battery (Provided with some models, or option)
The Slice Expansion Battery is included with some models, or can be
purchased separately as an optional accessory.
For detailed information on this battery, refer to
section in Chapter 3.
The Slice Expansion Battery 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 (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
You can change the Real Time Clock settings by pressing the F1 key. Refer
to Chapter 8
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.
User's Manual
Extending battery life
**** RTC battery is low or CMOS checksum is
inconsistent ****
Press [F1] key to set Date/Time.
Troubleshooting
Slice Expansion Battery
for detail.
Power and Power-Up Modes
in this chapter for
6-6