Toshiba TECRA S1 - Manual (Page 32)

1 Hardware Overview 1.9 Batteries
1-18 TECRA S1 Maintenance Manual
1.9 Batteries
The computer has the following three types of batteries:
Main battery pack
Real time clock (RTC) battery
Secondary battery pack (Optionally installed in the selectable bay)
Table 1-6 lists the specifications of these batteries.
Table 1-6 Battery specifications
Battery name Material Output voltage Capacity
Main battery pack Lithium Ion 10.8 V 6,450 mAh
RTC battery Lithium Ion 3.0 V 15 mAh
Secondary battery pack Lithium Ion 10.8V 4,300 mAh
1.9.1 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.
1.9.2 Battery Charging Control
Battery charging is controlled by LPC 47N253. When the AC adapter and battery pack are
attached to the computer, the LPC 47N253 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 1-7 Quick/normal charging time
Charge time
Off-state charge About 3 hours
On-state charge About 4 - 9 hours