dynabook TECRA A40-E, Руководство пользователя

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The battery might not be charged depending on how the computer is
being used, and the charge of battery decreases and battery might not
be fully charged sometimes.
If AC adaptor is connected via USB Type-C™ adapter, battery
charging time might become longer.
Charging notice
The battery might 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, charge it at room temperature of between 5°C to 35°C (41°F
to 95°F).
The battery is nearly completely discharged. In this instance, leave the
AC adaptor connected for a few minutes and the battery should begin
charging.
The DC IN/Battery indicator might 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.
In such cases, do the following:
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/USB Type-C™ port on
the computer, and to a wall outlet that is supplying power.
3. Charge the battery until the DC IN/Battery indicator glows white.
Repeat these steps two or three times until the battery recovers normal
capacity.
Monitoring battery capacity
Remaining battery power can be monitored using the following methods.
Clicking the battery icon on the Windows Taskbar
Via the Battery Status in the Windows Mobility Center window
Wait several seconds to monitor the remaining operating time because
the computer needs time to check the remaining capacity of the
battery pack and then calculate the remaining operating time, based
on this together with the current power consumption.
Be aware that the actual remaining operating time might differ slightly
from the calculated time.
User's Manual 4-10