User Guide

1.13 Batteries 1 Hardware Overview
Satellite A40 Maintenance Manual (960-458) 1-37
1.13.3 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. Table 1-14 lists the charging time and data preservation
period of the RTC battery.
Table 1-14 RTC battery charging/data preservation time
Status Time
Charging Time (power on) 8 hours
Data preservation period (full charge) 1 month