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1 Hardware Overview 1.7 Batteries
1-22 [CONFIDENTIAL] PORTÉGÉ M500 Maintenance Manual (960-559)
Data preservation time
When turning off the power in being charged fully, the preservation time is as following
Table 1-9.
Table 1-9 Data preservation time
Battery type Standby mode Boot mode
Main battery (4,700 mAh) 6 days 60 days
1.7.2 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. Table 1-10 lists the charging time and data
preservation period of the RTC battery.
Table 1-10 RTC battery charging/data preservation time
Status Time
Charging Time (power on) 8 hours
Data preservation period (full charge) 30 days