1-18 420 Series
❑ 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.
Table 1-10 Time required for quick charges
Charging time
Power off About 2 to 3 hours
Power on About 5 to 8 hours
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.
1.10.3 Backup Battery
The backup battery maintains data for AutoResume. The power source used to back up the
AutoResume data is determined according to the following priority:
AC power > Main battery > Backup battery
The backup battery is charged by the main battery or AC power cord. Table 1-11 shows the
charging time and data preservation period of the backup battery.
Table 1-11 Backup battery charging/data preservation time
Time
Charging Time Power On 20 H
Power Off 20 H
Data preservation period (full charge) 4 H
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