Toshiba Satellite C640 - Manual (Page 112)

User’s Manual 6-7
Power and Power-up Modes
Charging The Batteries
When the power in the battery pack becomes low, the DC IN/Battery
indicator flashes amber indicating that only a few minutes of battery power
remain. If you continue to use the computer while the DC IN/Battery
indicator flashes, the computer enables Hibernation Mode (so you don’t
lose data) and automatically turns off.You must recharge a battery pack
when it becomes discharged.
Procedures
To recharge a battery pack while it is installed in the computer, connect the
AC adaptor to the DC IN socket and plug the other end into a working
outlet.
The DC IN/Battery indicator glows amber when the battery is being
charged.
Time
The following table shows the approximate time required to fully charge a
discharged battery.
Charging time (hours)
Battery Charging Notice
The battery may not charge right away under the following conditions:
■ The battery is extremely hot or cold. If the battery is extremely hot, it
might not charge at all. Also, to ensure the battery charges to its full
capacity, charge the battery at room temperature of 10° to 30°C (50° to
86°F).
■ The battery is nearly completely discharged. Leave the AC adaptor
connected for a few minutes and the battery should begin charging.
The DC IN/Battery indicator may 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.
Use only the computer connected to an AC power source or the optional
TOSHIBA Batteries charger to charge the battery pack. Never attempt to
charge the battery pack with any other charger.
Battery type Power on Power off
Battery pack (3 cell) 8 hours or more 2.5 hours
Battery pack (6 cell) 8 hours or more 3.8 hours
The charging time when the computer is on is affected by ambient
temperature, the temperature of the computer and how you use the
computer. If you make heavy use of external devices, for example, the
battery might scarcely charge at all during operation. Refer also to the
section Maximizing Battery Operating Time .