Unscrew the two Phillips screws securing the battery cover to the lower case.

The screws remain captive to the battery cover.

Grasp the battery cover and lift out of the lower case.

Wedge the edge of an opening tool in between the top of the battery and its lower case housing and pry upwards to dislodge the battery.

Grasp the battery and remove it from the DSi.

Two screws are hidden underneath two rubber feet highlighted in red.

Use the tip of a spudger to pry the rubber foot out of the lower case.

In the same manner, remove the remaining foot off the lower case.

Remove the following screws securing the lower case to the body of the DSi:

• Six 5.2 mm Phillips screws.
• One 2.7 mm Phillips screw.

Insert the flat end of a spudger in between the lower case and lower front panel near the top right corner of the DSi.

Carefully run the spudger along the right edge of the DSi, creating an opening in the process.

Continue running the spudger along the backside of the DSi until the majority of the lower case has been separated from the lower front panel.

Cautiously lift the lower case from its bottom edge.

The lower case is still attached to the motherboard by the volume and SD board cable highlighted in red. Do not try to completely remove the lower case of the DSi yet.

Pry the volume and SD board cable up from its socket on the motherboard with the flat edge of a spudger.

Remove the lower case assembly from the DSi.

Pull the stylus straight out its housing and remove it from the rear case.

Remove the five 3.9 mm Phillips screws securing the stylus holder to the rear case.