Toshiba AT300 - Manual (Page 25)

Never try to remove or replace the battery by yourself which may
possibly result in serious injury. Please contact an authorized Toshiba
service provider, if necessary.
Charging the battery
When the battery power becomes low, you must charge it to avoid losing
any data.
Procedure
You can charge the battery when the tablet is either on or off by connecting
the AC adaptor.
Off
An icon shaped like an actual battery - a battery meter with flashing
borders appears in the center of the screen allowing you to keep track
of the battery level. When the battery is fully charged, the meter
reaches its full capacity.
On
Likewise, a battery meter on the right side of the System Bar indicates
the battery level.
Battery charging time
The following table shows the approximate time required to fully charge a
discharged battery when the AC adaptor is connected to the tablet.
Battery type Charging time
Battery (2 cell, 25Wh) about 8 hours
Please be aware that the charging time when the tablet is on is affected by
ambient temperature, the temperature of the tablet and how you are using
the tablet - for example if you make heavy use of external devices then the
battery might get scarcely charged up.
Battery exhausted time
The following table shows the approximate exhausted time of a fully
charged battery.
Battery type Time
Battery (2 cell, 25Wh) about 10 hours (in use)
about 3 days (sleep mode)
User's Manual 3-12