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Mobile Computing

Charging batteries

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.