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1 Hardware Overview 1.7 Batteries
22 Satellite/Satellite Pro/L630/L635 Maintenance Manual
12 Cell Lithium Ion 10.8 V 9000 mAh
RTC Battery Lithium Ion 3.0 V 14 mAh
1.7.1 Main Battery
The main battery pack serves as the computer's main power source when the AC adapter
is not attached. The main battery maintains the state of the computer so that it can
resume it.
1.7.2 Battery Charging Control
Battery charging is controlled by WINBOND NPCE781L. When AC adapter and battery
pack are attached to the computer, the NPCE781L controls the charge on/off state and
detects a full charge.
Battery Charge
When the AC adapter is attached, the battery is charged by off-state charge when the
system is powered off or by on-state charge when it is powered on.
Table 1-5 Quick/Normal Charging Time
State Charge Time
Off-State Charge 3/6/12 Cell About 4 hours max
On-State Charge 3/6/12 Cell About 4~10 hours max
NOTE: The time required for normal charge depends on the power consumption by the
system. Using the fluorescent lamp and frequently accessing the disk consume much
power and lengthen the charge time.
Any of the following cases stops battery charge:
1. The battery becomes fully charged.
2. The AC adapter or battery pack is removed.