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1.9 Batteries 1 Hardware Overview
PORTEGE A100 Maintenance Manual (960-460) 1-21
θ Quick Battery Charge
When the AC adapter is connected, normal charging is used while the system is
turned on and quick charge is used while the system is turned off or in suspend mode.
Table 1-13 shows the time required for charging battery.
Table 1-13 Time required for charges of battery
Main battery Charging Time Second battery Charging Time
Normal charge About 3~12 hours About 2.5~9 hours
Quick charge About 2.5 hours 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.
θ 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.
1.9.3 RTC Battery
The RTC battery provides the power supply to maintain the date, time, and other system
information in memory. Table 1-14 lists the battery charging time and data preservation
times.
Table 1-14 RTC battery charging time and data preservation time
Item Time
Charging
time
AC adapter or main battery in use
(Power ON)
8 hours
Data preservation time (when fully charged) About 30 days
Data preservation time (when stand by) About 4 days