Toshiba AT200 User Manual page 25

The indicator may show a rapid decrease in battery operating time when
you try to charge a battery under the following conditions:
In such cases you should follow the steps as detailed below:
1.
2.
3.
Repeat these steps two or three times until the battery recovers normal
capacity.
User's Manual
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 has not been used for a long time.
The battery has completely discharged and been left unattended for a
long time.
Fully discharge the battery with the power on until the system
automatically turns itself off.
Connect the AC adaptor to the docking interface of the tablet, and to a
wall outlet that is supplying power.
Charge the battery until the multi function LED indicator (when it is set
as Power/battery indicator) is off.
TOSHIBA AT200
3-13