3 rtc battery – Toshiba PORTEGE M400 User Manual
Page 41
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1.7 Batteries
1 Hardware Overview
PORTEGE M400 Maintenance Manual (960-541)
[CONFIDENTIAL]
1-27
1.7.3 RTC
Battery
The RTC battery provides the power supply to maintain the date, time, and other system
information in memory. Table 1-14 lists the battery charging time and data preservation
times.
Table 1-14 RTC battery charging/data preservation time
Time
Charging time
AC adapter or main battery in use
(Power ON)
about 8 hours
Data preservation time (when fully charged)
about 30 days
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