Battery Charging Control - Toshiba T200 User Manual

1.9.2

Battery Charging Control

Battery charging is controlled by a power supply microprocessor mounted on the power
supply. The microprocessor turns charging on or off and detects a full charge when the AC
adapter and main battery pack are attached to the computer. The system charges the main
battery pack using quick or trickle charge.
Quick Battery Charge
When the AC adapter is attached, there are two types of charge: quick charge when the
system is powered off and trickle charge when powered on. Table 1-10 gives quick charging
time requirements.
If one of the following occurs, the battery quick charge process stops.
1. The battery becomes fully charged.
2. The AC adapter or battery is removed.
3. The battery or AC adapter output voltage is abnormal.
4. The charge current is abnormal.
Trickle Battery Charge
When the main battery is fully charged and the AC adapter is attached, the power supply
microprocessor changes quick charge to trickle charge.
1-18
Table 1-10 Time Required For Quick Charges
Charge
Quick charge
(power off)
Quick charge
(power on)
Charging time
About 3 hours
About 8 hours
T200/T200CS