Dell OptiPlex 360 (Late 2008) - Manual (Page 94)

94 Coin-Cell Battery
.
5 Insert a plastic scribe between the battery retention tab and the battery,
and gently pry the batter loose.
6 Remove the battery from the system and properly dispose of it.
Replacing the Coin-Cell Battery
NOTE: This procedure assumes that you have completed the removal procedure
first.
1 Insert the edge of new battery, with "+" facing up, into the side of the
socket opposite the battery retention tab.
2 Snap the battery into place. Ensure it is secured by the retention tab.
3 Follow the procedure in "After Working on Your Computer" on page 17.
4 Enter the system setup program to restore the settings you recorded in
step 1 under the section Removing the Coin-Cell Battery and enter the
correct date and time. For more information on using the system setup
program, see the Dell Technology Guide on your computer or at
support.dell.com.
1 battery (positive side) 2 battery retention tab
1
2