- Fujitsu Notebook User Guide

61 - Lithium ion Battery
Low Battery State
When the battery is running low, a low battery notification message will appear. If you do not respond to
the low battery message, the batteries will continue to discharge until they are too low to operate. When
this happens, your notebook will go into Sleep mode. There is no guarantee that your data will be saved
once the notebook reaches this point.
Once your notebook reaches a point at which there is insufficient battery power, you will be unable to
resume operation until you provide a source of power either from an adapter, or a charged battery. Once
you have provided power, you will need to press the Power/Suspend/Resume button to resume operation.
When your system suspends due to low battery power, your data can be maintained for some time, but if
a power source is not provided promptly, the Power indicator will stop flashing and go out, meaning that
you have lost the data that was not stored. Once you provide power, you can continue to use your notebook
while an adapter is charging the battery.
Shorted Batteries
The Status Indicator panel uses an LED below the battery outline of the Battery Level indicator to display
the operating level available in that battery. If this display shows a Shorted Battery (i.e., it is flashing red),
it means the battery is damaged and must be replaced so it does not damage other parts of your notebook.
USING HEAVY CURRENT DEVICES SUCH AS FREQUENT DVD/CD-RW/CD-ROM ACCESSES MAY
PREVENT CHARGING COMPLETELY.
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ONCE THE LOW BATTERY NOTIFICATION MESSAGE APPEARS, SAVE ALL YOUR ACTIVE DATA AND PUT
YOUR NOTEBOOK INTO SLEEP MODE UNTIL YOU CAN PROVIDE A NEW POWER SOURCE. YOU SHOULD
PROVIDE A CHARGED BATTERY, AN AC POWER ADAPTER, OR AUTO/AIRLINE ADAPTER AS SOON AS
POSSIBLE.
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WHEN YOU ARE IN SLEEP MODE THERE MUST ALWAYS BE AT LEAST ONE POWER SOURCE ACTIVE. IF
YOU REMOVE ALL POWER SOURCES WHILE YOUR LIFEBOOK NOTEBOOK IS IN SLEEP MODE, ANY DATA
THAT HAS NOT BEEN SAVED TO THE HARD DRIVE WILL BE LOST.