Backup Battery; Real Time Clock Battery - Toshiba T2150CD Series Manual

Backup battery

Real Time Clock (RTC) battery
Main Battery
The removable main battery pack, also referred to in this manual as the main battery, is the
computer's main power source when the AC power cord is not attached.
You can purchase additional battery packs for extended use of the computer away from an
AC power source. One battery pack model is interchangeable among T2150CD series
computers.
The main battery recharges both the backup and the RTC batteries when the system's power
is on.
The backup and main battery maintain the state of the computer when you enable
AutoResume.
Backup Battery
The backup battery provides power for the computer's AutoResume feature. It backs up
data and programs in memory when the power is off, when the AC power cord is removed
and when the main battery pack is fully discharged or removed. If the backup battery is
completely discharged, AutoResume does not function and the computer loses all data in
memory. The following message appears when you turn on the power:
WARNING: RESUME FAILURE.
PRESS ANY KEY TO CONTINUE.

Real Time Clock Battery

The Real Time Clock (RTC) battery provides power for the internal real time clock and
calendar. It also maintains the system configuration, the TSETUP program's values and the
Pop-up window's contents.
If the RTC battery becomes completely discharged, the system loses this data and the real
time clock and calendar stop working. The following message appears when you turn on the
power:
*** Error in CMOS. Bad battery ***
Check system. Then press [F1] key . . . . . .
CAUTION