T2150 Series
1-19
1.10.3
Backup Battery
The backup battery maintains data for AutoResume. The power source used to back-up the
AutoResume data is determined according to the following priority:
AC power > Main battery > Backup battery
The backup battery is charged by the main battery or AC power cord when the system is
powered on. Table 1-11 shows the charging time and data preservation period of the backup
battery.
Table 1-11 Backup battery charging/data preservation time
Time
Charging Time
Power On
20 H
Power Off (with AC power)
20 H
Power Off (Without AC power) Doesn’t charge
Data preservation period (full charge)
5 H
1.10.4
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 1-12 shows the charging time and data
preservation period of the RTC battery.
Table 1-11 RTC battery charging/data preservation time
Time
Charging Time
With AC power
48 H
or main battery
Data preservation period (full charge)
1 month
Summary of Contents for T2150 series
Page 22: ...T2150 Series 2 3 Figure 2 1 Troubleshooting flowchart 1 2 ...
Page 135: ...4 20 T2150 Series Figure 4 17 Removing the top cover display assembly ...
Page 163: ...B 2 T2150 Series Figure B 2 FHVSY system board back ...
Page 164: ...T2150 Series B 3 B 2 FHWSD Board Figure B 3 FHWSD board ...
Page 181: ...C 14 T2150 Series ...
Page 182: ...T2150 Series D 1 Appendix D USA Display Codes Table D 1 USA display codes ...