Toshiba Satellite A300 Series - Computer Back Side Components; Modem Jack Description; FM Tuner Jack Description; Optical Disc Drive Type

Chapter 1 Hardware Overview
Satellite A300 Maintenance Manual (960-Q08)
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1.8.3 RTC Battery
The RTC battery provides the power supply to maintain the date, time, and other system
information in memory.
Table 1-10 lists the Time required for charges of RTC battery and data preservation time.
Table 1-10 Time required for charges of RTC battery
Condition Time
Power ON (Lights Power LED) About 24 hours
Data preservation tome (Full-charged) About a month