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1.8.2
Battery Charging Control
Battery charging is controlled by a 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
adapter and battery are attached to the computer. The system charges the battery using quick
charge or trickle 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 the system is powered on.
Quick charge
(power off)
Trickle charge
(power on)
Quick Battery Charge
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 automatically changes quick charge to trickle charge.
610CT
Table 1-7 Time required for battery charges
Status
Charging time
About 4 hours
About 5 to 8 hours
1-15
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