Turn the laptop so that the back cover is visible and facing you. Make sure it is on a flat surface, such as a table.

Using a standard PH0 Phillips-head screwdriver, work your way around the edge removing the 6mm screws along the way.

Once all the screws are removed, you should easily be able to remove the back cover. This can be done by hand or by using a Spudger as seen in the tools list.

Once the back cover is removed, make sure you disconnect the battery cable.