1 Hardware Overview
PORTÉGÉ X30W-J, dynabook V*/VZ*/VC* Series Maintenance Manual (960-941) [CONFIDENTIAL] 1-19
1.7.2 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.
Battery Charge
When the AC adaptor is attached, the battery is charged. There are two types of charge
depending on the power conditions: power on and power off. The following table lists the
charging time required for charges.
Table 1-7 Time required for charges
Battery type Power on (hours) Power off (hours)
Battery (4Cell，53Wh)
About 3.5 About 3.5 – 10.0
If any of the following occurs, the battery charge process stops.
1. The battery becomes fully charged.
2. The AC adaptor or battery is removed.
3. Output voltage from main battery or AC adapter is abnormal.
4. Charging current is abnormal.
Data preservation time
When turning off the power in being charged fully, the preservation time is as follows.
Table 1-8 Data preservation time
Type of battery
Preservation time
Sleep Shutdown/Hibernation
Main battery
(4Cell，53Wh)
About 5 days About 50 days
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