Fairphone 4 Case for wireless QI charging

This is a second generation remix of the excellent work of Paperpilot 88, adding some space to house a QI charging pad inside the bumper. Using that, the Fairphone4 is upgraded to QI charging :-) To make space, the back of this cover has been thickened very slightly (0.4mm). On the positive side, this lifts the camera about 0.1 mm off a flat table surface and adds  some basic lens scratch protection by doing so.

Pictures are of the first beta version. It seems to be like 0.5-1mm too big to sit really tight when printed in TPU. Also I am having some bridging issues. Charging works as expected!

It is important to print 0.1mm layers for stability, otherwise the thin part underneath the charger will probably not last very long.

Please note that I am still refining some minor issues.

Updates: 

• v2 has been shrunk by 0.5mm in X an Y but it is still not as tight as I would expect. Moreover, the lens cutout has been adjusted slightly for a better fit.

more refined STLs will be uploaded soon.
 

Print instructions:

Material: TPU (95A)
Supports: no
Layers: 0.1mm (you need at least 2 layers below the charging pad, 3 is better!)
 

Make sure your cooling blower is way up when the holes need to be printed and bridged. Choose print orientation so that the button side gets optimal cooling airflow.