Rtc Battery - Toshiba Satellite P20-25 Series Maintenance Manual

1 Hardware Overview
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.
Charging Time (power on)
Data preservation period (full charge)
1-18
Status
Satellite P20-25 Series Maintenance Manual
1.6 Batteries
Time
About 48 hours
2 month