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1 Hardware Overview 1.10 Batteries
1-24 [CONFIDENTIAL] PORTEGE R500 Maintenance Manual (960-634)
1.10.3 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 1-9 lists the charging time and data
preservation period of the RTC battery.
Table 1-9 RTC battery charging/data preservation time
Status Time
Charging Time (power on) 24 hours
Data preservation period (full charge) 30 days