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Mobile Computing
Charging batteries
5.375 x 8.375 ver 2.1.2
Leave the power connected, and the battery should begin
charging after a few minutes.
HINT: Once a battery is fully charged, we recommend that you
operate your computer on battery power until the battery
discharges completely. Doing this extends battery life and helps
ensure accurate monitoring of battery capacity.
Charging the RTC battery
The computer contains an internal battery that provides
power for the real-time clock (RTC) and calendar.
During normal use, the main battery keeps the RTC battery
adequately charged. Occasionally, the RTC battery may lose
its charge completely, especially if you have had the
computer turned off for a long time.
If the RTC battery is low, the real-time clock and calendar
may display the incorrect time and date, or stop working.
To recharge the RTC battery, plug in the computer and leave
it turned off for at least 24 hours.
NOTE: It is seldom necessary to charge the RTC battery because it
charges while the computer is off. If the RTC battery is low, the
real-time clock and calendar may display the incorrect time and
date or stop working.
When Hibernation mode is enabled and the RTC battery is
completely discharged, a warning prompts you to reset the real-
time clock.
The computer can be used while the RTC battery is being
charged, although the charging status of the RTC battery
cannot be monitored.