Toshiba Qosmio Personal Computer X500 - Manual (Page 40)

Chapter 1 Hardware Overview
1.8.3 RTC Battery
The RTC battery provides the power supply to maintain the date, time, and other system
information in memory.
Table 1-8-4 lists the Time required for charges of RTC battery and data preservation time.
Table 1-8-4 Time required for charges of RTC battery
Qosmio X500 Maintenance Manual (960-Q08) 24