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1 Hardware Overview 1.7 Power Supply
1.8 Batteries
The computer has the following two types of batteries:
Main Battery Pack
Real Time Clock (RTC) Battery
Table 1-5 lists the specifications of these batteries.
Table 1-5 Battery Specifications
Battery Type Material Output voltage Capacity
Main Battery Pack 6 Cell
Lithium Ion 10.8 V 4000 mAh
RTC Battery
Lithium Ion 3.0 V 14 mAh
1.1.1 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.
1.1.2 Battery Charging Control
Battery charging is controlled by WINBOND 8769L. When the AC adapter and battery
pack are attached to the computer, the 8769L 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.
Qosmio F40/F45 Maintenance Manual 28