Working with t he notebook
Rechargeable battery
BatteryBatteryServicelife,batteryRechargeablebatteryBattery
During use as a portable, the noteboo k runs on its built-in battery. You can increase
the service life of the battery by caring for the battery properly. The average batte ry
service life is around 500 c harge/discharge cycles.
You can extend the battery service life by taking advantage of the available energy saving f unctions.
Charging, caring for and maintaining the battery
BatteryBattery
The notebook battery can only be charged if the ambient temperature is between
5°C / 41°F and a maximum of 35°C / 95°F.
You can charge the battery by connecting the noteb ook to the AC adapter
(see "
Connecting the AC adapter", Page 19).
If the batte ry is running low you will hear a warning alarm. If you do not connect the AC adapter
within five minutes of the warning alarm described above, your notebook will automatically switch off.
Monitorin g the battery state of charge
Batterybat terycharge met
er
Windows also has a "Battery charge meter" in the taskbar for m onitoring the
battery capacity. When you place the mouse pointer on the battery symbol, the
system displays the state of charge of the battery.
Battery storage
BatteryBatterySelf-discharge,batteryChargecapacity,batter y
The battery should be stored in a dry environment at a temperature between 0°C / 32°F and
30°C / 86°F. The lower the storage temperature, the lower the rate of self-discharge.
If you w ill be storing batteries for a longer period (m ore than two months),
the battery charge level should be approx. 30%. To prevent exhaustive
discharge which would permanently damage the batt ery, check the level
of charge of the battery at regular intervals.
To be able to ma ke use of the optimum capacity of the battery, you should allow
the battery to fully discharge and then recharge it.
If you will not use batteries for long periods, remove them from the
notebook. Never store batteries in the device.
Removing and installing the battery
Only use
batteries approved by F ujitsu for your notebook.
Never us
e force when fitting or removing a battery.
Make su
re that no foreign bodies get into the battery connections.
Never s
tore a battery for long periods in the discharged state. This
can ma
ke it impossible to recharge.
Fujitsu 51
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