Toshiba T1900 Series - Backup Battery Charging; RTC Battery Charging

1.9.3 Backup Battery
The backup battery maintains data for AutoResume and Hard RAM. The power source used
to back-up the AutoResume or Hard-RAM 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 1-10 shows the charging time and data preservation period of the backup battery.
Table 1-10 Backup Battery CharginglData Preservation Time
Backup BaHery Time
Charging Time Power On 16 Hours
Power Off (with AC adapter)
60 Hours
Power Off (without AC adapter)
Doesn't charge
Data Preservation Period (full charge)
8 Hours
1.9.4 RTC Battery
The RTC battery provides power to keep the current date, time and other setup information in
memory while the computer is turned off. Table 1-11 shows the charging time and data
preservation period
of the RTC battery.
Table 1-11 RTC Battery CharginglData Preservation Time
RTC BatteI'{ Time
Charging Time
Power On 24 Hours
Power Off 24 Hours
Data Preservation Period (full charge) 1 Month
1-17
...