Toshiba R100 Battery Charging Control, Time required for charges of main battery, RTC Battery

1.6 Batteries 1 Hardware Overview

1.6.2 Battery Charging Control

Battery charging is controlled by a power supply microprocessor. The power supply microprocessor controls power supply and detects a full charge when the AC adaptor and battery are connected to the computer. The system charges the battery using quick charge or trickle charge.

❑Quick Battery Charge

When the AC adapter is connected, normal charging is used while the system is turned on and quick charge is used while the system is turned off or in suspend mode. (See Table 1-7)

Table 1-7 Time required for charges of main battery

	Charging Time
Normal charge	About 2 to 4 hours
Quick charge	About 2 hours

Quick battery charge is stopped in the following cases.

1.The main battery is fully charged

2.The main battery is removed

3.Main battery or AC adapter voltage is abnormal

4.Charging current is abnormal

❑Trickle charge

When the main battery is fully charged and the AC adapter is plugged in, the power supply microcontroller automatically switches from quick charge to trickle charge.

1.6.3RTC Battery

The RTC battery provides the power supply to maintain the date, time, and other system information in memory. Table 1-8 lists the battery charging time and data preservation times.

Table 1-8 RTC battery charging/data preservation time

		Time
Charging	AC adapter or main battery in use	8 hours (approx )
Data preservation time (when fully charged)		1 month

PORTEGE R100 Maintenance Manual (960-440) 1-17