Toshiba Tecra M5-S5131 Resource Manual page 37

Running the computer on battery power
Battery life may vary considerably from specifications depending
on product model, configuration, applications, power management
settings and features utilized, as well as the natural performance
variations produced by the design of individual components.
Published battery life numbers are achieved on select models and
configurations tested by Toshiba at the time of publication.
Recharge time varies depending on usage. Battery may not charge
while the computer is consuming full 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 that shipped 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 "Maintaining your battery" on page 41 for
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.
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.
Monitoring main battery power
The computer's main battery light gives you an indication of the
main battery's current charge. The following also applies to the
secondary battery (available on certain models) if installed.
❖ Glows amber while the main battery is being charged (AC
adaptor connected)
❖ Glows green when the main battery is fully charged
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.
Mobile computing
37