Toshiba WT7-C - Manual (Page 32)

The battery pack can explode if not used, handled or disposed of
properly. Dispose of the battery as required by local ordinances or
regulations.
Charge the battery pack only in an ambient temperature between 5
and 35 degrees Celsius. Otherwise, the electrolyte solution might leak,
battery pack performance might deteriorate and the battery life might
be shortened.
Charging the battery
When the power in the battery pack becomes low, the tablet will enable
Hibernation Mode so that you do not lose any data, and automatically turn
itself off.
You must recharge a battery pack when it becomes discharged.
Procedures
To recharge the battery pack, connect the AC adaptor to the Micro-USB
port on the tablet and plug the other end into a working outlet.
Use only the tablet connected to an AC power source or optional TOSHIBA
Battery charger to charge the battery pack. Never attempt to charge the
battery pack with any other charger.
Charging Time
The following table shows the approximate time required to fully charge a
discharged battery.
Battery type Power off Power on
Battery pack (12.9Wh, 1 cell) about 4.5 hours about 6.5 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 - if you make heavy use of external devices for example, the
battery might scarcely charge at all during operation.
Battery charging notice
The battery may 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, you should charge it at room temperature of between 5°C to
35°C (41°F to 95°F).
User's Manual 4-3