Be cautious when removing the back panel of the device. Buttons tend to become loose and fall out of place. Some force is necessary in removing the back and front panels.
Use the T5 Torx screwdriver to remove the two 3.8 mm screws located in the back right corner of the device.
Using a plastic opening tool, pry off the back cover by going around the device until the panel is completely detached.
Use a T5 Torx screwdriver to remove the ten 4.0 mm screws lining the perimeter of the device.
Using the plastic opening tools, pry off the front panel of the device.
With your plastic opening tool, lift up on the connectors to disconnect them.
Remove the tape which holds the wiring to the battery using a plastic opening tool.
On the back side of the middle panel, pry the battery using the plastic opening tools.
Slide the connecting wire through the opening of where the battery was placed.