Toshiba TOSHIBA NB100 5BBatteries Hardware Overview, Main Battery, Battery Charging Control

1.6 5BBatteries 1 Hardware Overview

1.6Batteries

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
Main Battery Pack	4 Cell	Lithium Ion	7.4 V	4000 mAh
	4 Cell	Lithium Ion	7.4 V	5200 mAh
RTC Battery		Lithium Ion	3.0 V	18 mAh

1.6.1Main 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.

1.6.2Battery 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

Libretto L100 Maintenance Manual 19