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User’s Manual 6-6
Power and Power-Up Modes
Time
The following table shows the approximate time required to fully charge a
discharged battery.
Charging time (hours)
Battery charging notice
The battery may not begin charging immediately under the following
conditions:
■ The battery is extremely hot or cold (if the battery is extremely hot, it
might not charge at all). To ensure the battery charges to its full capacity,
you should charge it at room temperature of between 5° to 35°C (41° to
95°F).
■ The battery is nearly completely discharged. In this instance you should
leave the AC adaptor connected for a few minutes and the battery
should begin charging.
The Battery indicator may show a rapid decrease in battery operating time
when you try to charge a battery under the following conditions:
■ The battery has not been used for a long time.
■ The battery has completely discharged and been left in the computer for
a long time.
■ A cool battery is installed in a warm computer.
In such cases you should follow the steps as detailed below:
1. Fully discharge the battery by leaving it in the computer with the power
on until the system automatically turns itself off.
2. Connect the AC adaptor to the DC IN 19V jack of the computer, and to a
wall outlet that is supplying power.
3. Charge the battery until the Battery indicator glows white.
Repeat these steps two or three times until the battery recovers normal
capacity.
Battery type Power on Power off
Battery Pack
(48Wh/61Wh, 6 cell)
about 12 or longer about 4 or longer
RTC battery about 24 about 24 with AC or
battery pack
Please be aware that the charging time when the computer is on is
affected by ambient temperature, the temperature of the computer and
how you are using the computer - if you make heavy use of external
devices for example, the battery might scarcely charge at all during
operation. Please refer to the section Maximizing battery operating time for
further information.