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1.6 5BBatteries 1 Hardware Overview
Libretto L100 Maintenance Manual 19
1.6 Batteries
The computer has the following three types of batteries:
Main Battery Pack
Real Time Clock (RTC) Battery
Table 1-5 lists the specifications of these batteries.
Table 1-3 Battery specifications
Battery Type Material Output voltage Capacity
4 Cell Lithium Ion 7.4 V 4000 mAh
Main Battery Pack
4 Cell Lithium Ion 7.4 V 5200 mAh
RTC Battery
Lithium Ion 3.0 V 18 mAh
1.6.1 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.
1.6.2 Battery Charging Control
Battery charging is controlled by ITE IT8512E. When the AC adapter and battery
pack are attached to the computer, the IT8512E 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.
State Charge Time
Off-State Charge
4 Cell About 4 hours max
On-State Charge
4 Cell About 4~10 hours max
Table 1-4 Quick/Normal charging time