Toshiba portege 610ct 620ct Servicehandbuch

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The backup battery maintains data for resume.  The power source used to back-up the resume
data is determined according to the following priority:

 AC adapter > Main battery > Backup battery

The backup battery is charged by the main battery or AC adapter when the system is powered
on.  Table 1-8 shows the charging time and data preservation period of the backup battery.

Charging Time

Power On

40 H

Power Off (with AC Adapter)

 40 H

Power Off (Without AC Adapter)  Doesn’t charge

Data preservation period (full charge)

1.5 H

The RTC battery provides power to keep the current date, time, and other setup information
in memory while the computer is turned off.  Table 1-9 shows the charging time and data
preservation period of the RTC battery.

Charging Time

Power On

70 H

Power Off

Dosen’t charge

Data preservation period (full charge)

1 month