Dell Dimension 4100 - Manual (Page 81)

Appendix 81
If you have to repeatedly reset time and date information after turning on
the computer, replace the battery.
CAUTION: A new battery can explode if it is incorrectly installed.
Replace the 3-V CR2032 battery only with the same or equivalent
type recommended by the manufacturer. Discard used batteries
according to the manufacturer’s instructions.
1 Record all the screens in the system setup program so that you can
restore the correct settings in step 6.
2 Remove the computer cover (see page 42).
NOTICE: To avoid damage to the system board while you pry the battery
loose, be sure to insert the plastic screwdriver between the battery and the
socket (not the system board).
3 Locate the battery socket (see page 44) and pry the battery out of its
socket with your fingers or with a plastic screwdriver.
4 Insert the battery into the socket with the side labeled “+” facing up.
5 Replace the computer cover (see page 71), and plug your computer
and devices into their electrical outlets.
6 Access the system setup program and restore the settings you recorded
in step 1.
battery socket
(BATTERY)
battery