Dell PowerEdge C6220 II Owner's Manual page 245

Figure 3-66. Replacing the System Battery
1 system battery
3 negative side of battery connector
7 Replace the system-board assembly. See "Installing a System-Board
Assembly" on page 171.
8 Enter the System Setup program to confirm that the battery is
operating properly. See "Using the System Setup Program" on page 68.
9 Enter the correct time and date in the System Setup program's Time
and Date fields.
10 Exit the System Setup program.
2 positive side of battery connector
Removing and Installing System Components | 245