User's Guide

Mobile Computing

Charging the battery

Wall Outlet—The fastest way to charge your tablet is with

the included USB/AC adaptor plugged into a wall outlet.

Charging the RTC battery

Your device has 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.

Depending on your system, the RTC battery may only

charge while the device is turned on.

To recharge the RTC battery, plug the device into a live

electrical outlet via the USB/AC adaptor and leave the device

powered on for 24 hours.

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.

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

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.

Touch the power icon in the notification area. (See “Finding

your way around the desktop” on page 77 for more

information on the notification area.) The window displays

the remaining battery power as a percentage.

NOTE