Toshiba 400CS User Manual page 19

1.10.2 Battery Charging Control
Battery charging is controlled by a power supply microprocessor that is mounted on the
power supply. The microprocessor controls whether the charge is on or off and detects a full
charge when the AC power cord and battery are attached to the computer. The system
charges the battery using quick charge or trickle charge.
Quick Battery Charge
When the AC power cord is attached, there are two types of charge: quick charge
when the system is powered off and trickle charge when the system is powered on.
Power off
Power on
If one of the following occurs, the battery quick-charge process stops:
1. The battery becomes fully charged.
2. The battery is removed.
3. The battery or AC output voltage is abnormal.
4. The charge current is abnormal.
Trickle Battery Charge
When the main battery is fully charged and the AC power cord is attached, the power
supply microprocessor automatically changes from quick charge to trickle charge.
400 Series
Table 1-10 Time required for quick charges
About 2 to 3 hours
About 5 to 8 hours
Charging time
1-19