Chapter 1 Hardware Overview
Satellite L600/L640/L645, Satellite Pro L600/Pro L640/Pro L645 Maintenance Manual (960-Q08)
1.7.3 RTC Battery
The RTC battery provides the power supply to maintain the date, time, and other system
information in memory.
Table 1-7-4 lists the Time required for charges of RTC battery and data retaining time.
Condition Time
Charging time About 24 hours
Data retaining time About 30days
Table 1-7-4 Time required for charges of RTC battery