Charging The Rtc Battery; Determining Remaining Battery Power - Toshiba Portege Z20-B Series User Manual

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Mobile Computing
Monitoring battery power

Charging the RTC battery

Your device may have an internal real-time clock (RTC)
battery. The RTC battery powers the System Time Clock and
BIOS memory used to store your device's configuration
settings. When fully charged, it maintains this information for
up to a month when the device is powered off.
The RTC battery may have become completely discharged
while your device was shipped, resulting in a CMOS error
message during startup. The error message may vary by
device model.
NOTE
To recharge the RTC battery, plug the device into a live
electrical outlet and leave the device powered on for 24
hours.
NOTE
The device can be used while the RTC battery is being
charged, although the charging status of the RTC battery
cannot be monitored.

Determining remaining battery power

NOTE
Touch the
your way around the desktop" on page 99
information on the notification area. A pop-up message
displays the remaining battery power as a percentage.
Depending on your system, the RTC battery may only
charge while the device is turned on.
It is seldom necessary to charge the RTC battery
because it charges while the device is on. If the RTC
battery is low, the real-time clock and calendar may
display the incorrect time and date or stop working.
When the RTC battery is completely discharged, a
warning prompts you to reset the real-time clock.
Wait a few moments after turning on the device before
trying to monitor the remaining battery power. The device
needs this time to check the battery's remaining capacity
and perform its calculations.
icon in the notification area, see
Power
"Finding
for more