Performing The Battery Learning Cycle; Charging The Battery - Fujitsu Siemens Computers CELSIUS Mobile A Operating Manual

Working with the notebook

Performing the battery learning cycle

The battery contains electronics that continuously monitor the battery charging level and display the
current charging level. To compensate for measuring errors in the electronics, and because the
chemical properties of the battery change over time, the electronics must be recalibrated regularly.
This calibration is carried out using a battery learning cycle. Using the battery learning cycle ensures
that the maximum battery capacity can always be used. During the learning cycle a defined charging
cycle is carried out.
The battery learning cycle lasts between four and six hours and must not be aborted.
i
During this period you can not work with the notebook!
After six months, at the latest, you should run a learning cycle with the battery again.
Ê
Restart the notebook (switching ON/OFF or warm boot).
The following display briefly appears on the screen during start-up:
<ESC> Diagnostic screen
learning
Ê
Press function key [F6].
The learning cycle is started. When the learning cycle is ended, a corresponding message is
displayed.

Charging the battery

The battery indicator displays the remaining battery charge (see the "Indicators" chapter). When you
switch on the notebook, it takes a few seconds before the battery status is displayed.
You can charge the battery by connecting the notebook to the power adapter (see "Connecting the
power adapter and switching on the notebook").
The battery can only be charged when the ambient temperature is between 5°C and max. 35°C.
With the notebook switched on or off, the battery will completely recharge in approximately three to
four hours.
Work in the battery mode until an acoustic warning prompts you to recharge and the battery
indicator begins to flash. The notebook battery should not be charged before this point.
If you do not connect the power adapter within five minutes of the signals described above, your
notebook will automatically switch off.
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<F12> Boot Menu <F2> BIOS Setup
A26391-K113-Z120-5-7619
Battery
<F6> Battery