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Chapter 3
User-Installable Features
Lithium ion Battery
Your LIFEBOOK notebook has a Lithium ion battery that provides power for operating your notebook when no external
power source is available. The battery is durable and long lasting, but should not be exposed to extreme
temperatures, high voltages, chemicals or other hazards.
The Lithium ion battery operating time may become shorter if it is used under the following conditions:
• When used at temperatures that exceed a low of 5°C or a high of 35°C. Extreme temperatures not only reduce
charging efficiency, but can also cause battery deterioration. The Charging icon on the Status Indicator panel
will flash when you try to charge a battery that is outside its operating temperature range. See “Status Indicator
Panel” on page 19.
• When using a high current device such as a Multi-Format DVD Writer, CD-ROM drive, optical drive, or the hard
drive, using the AC adapter will conserve your battery life.
DO NOT LEAVE A FAULTY BATTERY IN YOUR NOTEBOOK. IT MAY DAMAGE YOUR AC ADAPTER, OPTIONAL AUTO/AIRLINE ADAPTER, ANOTHER BATTERY
OR YOUR NOTEBOOK ITSELF. IT MAY ALSO PREVENT OPERATION OF YOUR NOTEBOOK BY DRAINING ALL AVAILABLE CURRENT INTO THE BAD BATTERY.