1.10 Batteries 1 Hardware Overview
TECRA 9100 Maintenance Manual (960-347) 1-25
1.10.2 Battery Charging Control
Battery charging is controlled by a power supply microprocessor. The microprocessor
controls whether the charge is on or off and detects a full charge when the AC adaptor and
battery are attached to the computer. The system charges the battery using quick charge.
Quick Battery Charge
When the AC adaptor is attached, there are two types of quick charge: quick charges
1 when the system is powered off and quick charge 2 when the system is powered on.
Table 1-9 Time required for quick charges
Status
Computer only
Charging time
Port Replicator
2001
Quick charge 1 (power off) 2.5 hours 2.5 hours
Quick charge 2 (power on) 3.0 to 8.0 hours or longer
NOTE: The time required for quick charge 2 is affected by the amount of power
the system is consuming. Use of the fluorescent lamp and frequent disk access
diverts power and lengthens the charge time.
If any of the following occurs, the battery quick charge process stops.
1. The battery becomes fully charged.
2. The AC adaptor or battery is removed.
3. The battery or output voltage is abnormal.
Detection of full charge
A full charge is detected only when the battery is charging at quick charge. A full
charge is detected under any of the following conditions:
1. The current in the battery charging circuit drops under the predetermined
limit.
2. The charging time exceeds the fixed limit.
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