Monitoring Battery Pack Capacity - Toshiba portege z20t-b User Manual

Battery pack type
With the second
battery pack (36 Wh, 3
cell)
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.
Charging notice
The battery pack might not begin charging immediately under the following
conditions:
The Battery and/or Second Battery indicator might show a rapid decrease
in battery operating time when you try to charge a battery pack under the
following conditions:
In such cases, do the following:
1.
2.
3.
Repeat these steps two or three times until the battery pack recovers
normal capacity.

Monitoring battery pack capacity

Remaining battery power can be monitored using the following methods.
User's Manual
The battery pack is extremely hot or cold (if the battery pack is
extremely hot, it might not charge at all). To ensure the battery pack
charges to its full capacity, charge it at room temperature of between
5°C to 35°C (41–95°F).
The battery pack is nearly completely discharged. In this instance,
leave the AC adaptor connected for a few minutes and the battery
pack should begin charging.
The battery pack has not been used for a long time.
The battery pack has completely discharged and been left in the
computer for a long time.
Fully discharge the battery pack with power on until the system
automatically turns itself off.
Connect the AC adaptor to the DC IN 19V jack, and to a wall outlet
that is supplying power.
Charge the battery pack until the Battery and/or Second Battery
indicator glows white.
Clicking the battery icon on the Windows taskbar
Via the Battery Status (average remaining battery power of Battery
#1 and Battery #2) in the Windows Mobility Center window
Power off
about 3.5 hours
Power on
about 3.5 - 10 hours
4-17