Dell P28S Owner's Manual page 10

I I nstalling base cover
1 Align the base cover tabs to the slots on the edges of the computer.
2 Press the edges of the cover until it clicks into place.
3 Tighten the M2.5 x 6.0 captive screws to secure the base cover to the computer.
Remember: Exercise caution when tightening the screws. Angle the screw driver to match the head of the screw to avoid a
possible stripped screw head.
4 Follow the procedure in
Battery
Removing 3-cell battery
1 Follow the procedure in
2 Remove the base cover.
3 To remove the battery:
a Disconnect the battery cable from the connector on the system board [1].
b Remove the M2 x 5 screw (1) that secures the battery to the computer [2].
c Lift the battery from the computer [3].
10 Removing and installing components
After working inside your computer.
Before working inside your computer.