Toshiba A200 manual Batteries Hardware Overview, Main Battery Charging Control

1.7 Batteries 1 Hardware Overview

1.7.2 Main Battery Charging Control

Battery charging is controlled by a power supply microprocessor. The power supply microprocessor controls power supply and detects a full charge when the AC adapter and battery are connected to the computer. The system charges the battery using quick charge or trickle charge.

?Quick Battery Charge

When the AC adapter is connected, normal charges is used while the system is turned on, and quick charge is used while the system is turned off or in suspend mode. Table 1-10 shows the approximate time required for charging battery.

Table 1-10 Time required for charging battery

	Main battery Charging Time
Normal charge	About 4 to 10 hours
Quick charge	About 2.5 hours

Quick battery charge is stopped in the following cases.

1.The main battery is fully charged.

2.The main battery is removed.

3.Main battery or AC adapter voltage is abnormal.

4.Charging current is abnormal.

?Trickle charge

When the main battery is fully charged and the AC adapter is plugged in, the power supply microcontroller automatically switches from quick charge to trickle charge.

PORTEGE A200 Maintenance Manual (960 -499) 1-19