Toshiba PORTEGE R500 Series User Manual page 102

102
Mobile Computing
Running the computer on battery power
After a period of time, the battery will lose its ability to perform at
maximum capacity and will need to be replaced. This is normal for
all batteries. To purchase a new battery pack, see the accessories
information included with your computer or visit the Toshiba Web
site at accessories.toshiba.com. Use only batteries designed to work
with your Toshiba notebook computer.
To ensure that the battery maintains its maximum capacity, operate
the computer on battery power at least once a month. The Lithium-
Ion battery has no memory effect so it is not necessary to let the
battery fully discharge each time. However, for better accuracy of
the battery meter, it is helpful to fully discharge the battery
periodically. Please see
procedures. If the computer is continuously operated on AC power,
either through an AC adaptor or a port replicator (if applicable to
your system), for an extended period (more than a month), the
battery may fail to retain a charge. This may shorten the life of the
battery, and may cause the battery meter to be inaccurate.
NOTE
The computer also has an internal real-time-clock (RTC) battery.
The RTC battery powers the RTC memory that stores your system
configuration settings and the current time and date information. It
maintains this information for up to a month while the computer is
turned off.
"Maintaining your battery" on page 115
For optimum DVD performance, it is recommended that you play
DVDs while running the computer on AC power. In addition, your
computer's Power Saver utility can be used to select a power level
setting for DVD playback.
TECHNICAL NOTE: The RTC battery does not charge while the
computer is turned off, even when AC power is attached.
The RTC battery charges only while the computer is powered on.
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