Toshiba Qosmio Personal Computer X500 - Manual (Page 37)

Chapter 1 Hardware Overview
1.8 Batteries
The PC has the following two batteries.
Main battery
Real time clock (RTC) battery
Table 1-8-1 lists the specifications for these two batteries.
Table 1-8-1 Battery specifications
1.8.1 Main Battery
The main battery is the primary power supply for the computer when the AC adapter is not
connected.
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Qosmio X500 Maintenance Manual (960-Q08)