1 Hardware Overview

1.6 Batteries

Detection of full charge

A full charge is detected from the battery pack through SMBus when the battery is charging.

1.6.2 RTC battery

The RTC battery provides power to keep the current date, time and other setup information in memory while the computer is turned off. The table below lists the charging time and data preservation period of the RTC battery. The RTC battery is charged by the adaptor or main battery, while the computer is powered on.

Status

Time

 

 

Charging Time (power on)

About 48 hours

 

 

Data preservation period (full charge)

2 month

 

 

1-18

Satellite P20-25 Series Maintenance Manual

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Image 32
Toshiba P25 manual RTC battery, Status Time