Toshiba TECRA S1 manual Hardware Overview Batteries, Main Battery, Battery Charging Control

1 Hardware Overview 1.9 Batteries

1.9Batteries

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

1.9.1Main 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.

1.9.2Battery 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

1-18 TECRA S1 Maintenance Manual