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Time
The following table shows the approximate time required to fully charge a dis-
charged battery.
Charging time (hours)
Battery type Power on Power off
Battery pack 8400mAh 7 to 20 or longer about 3.5
RTC battery 8 Doesn’t charge
NOTES: 1. The charging time when the computer is on is affected by
ambient temperature, the temperature of the computer and
how you use the computer. If you make heavy use of external
devices, for example, the battery might scarcely charge at all
during operation. Refer also to the section Maximizing
battery operating time.
2. The charge time of a battery changes with the apparatus
composition and the situation of operation of a personal
computer, or the specifications of AC adaptor.
Battery charging notice
The battery may not charge right away 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, charge the
battery at room temperature of 10° to 30°C (50° to 88°F).
❑ The battery is nearly completely discharged. Leave the universal 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 case, follow the steps below.
1. Fully discharge the battery by leaving it in the computer with the power on
until the power automatically shuts off.
2. Plug in the AC adaptor.
Care and use of the battery pack