Real time clock (rtc) battery – Toshiba Libretto U100 User Manual
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6-4
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
in this chapter for
procedures. If the computer is continuously operated on AC power through
an AC adaptor for an extended period, for example 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.
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 settings maintained by the RTC battery by pressing F1
key. Refer to Chapter 9
for details on how to do this.
■
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.
■
Always dispose of used battery packs in compliance with all applicable
laws and regulations. Put insulating tape, such as cellophane tape, on
the electrode during transportation to avoid a possible short circuit, fire
or electric shock. Failure to do so could possibly result in serious injury.
■
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 will lose
all data in memory.
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.