My car lacks accessible vents or places for suction cups, so, the only way to get a phone within the eyes' and arm's reach is either the ashtray or the lining.

After trying out different designs for an ashtray phone holder with wireless charging, I've decided to go a different route. This design reuses a commercial universal wireless charger, cheap (~5 USD) and replaces the ball with a custom one.

It's designed to go inside the dashboard lining, see the picture for my placement.

I use it for a Pixel 3 but should work with any phone.

The lining can be spread with a thin card or special automotive tools. If you get a flat micro USB cable, you can also route the cable inside the car up to the phone holder.

I won't provide a link to the charger, but I bought it from AliExpress and contains the following text in the title "FDGAO 10W Qi Wireless Car Charger"

Design

OnShape link: https://cad.onshape.com/documents/41200c8734a10209bbe3f9c8/w/74b349638e2834f45c5e729f/e/2aa0005addc5f76d74ed18c4

The ball/socket size is 17mm, you can either edit the design in OnShape for different ball sizes or try scaling my design.

The insert has small protrusions on it to help with adhesion, otherwise it slips around too much. It is 2mm thick, I've tried 1mm and it causes a lot of flexing.

Printing

Printed with 25% infill in white PETG (too lazy to change filaments) but should work fine with PLA. Layer height 0.25mm, supports and rafts were on. The object should be rotated with the ball facing down before printing.