Can you come back with the result on your experiment? I might do something like that too. The thing is magnets have been known to interfere with wireless charging.
Also, I emailed the company behind the one I have asking them if they will have a fast charging one later. They replied saying their engineers are working on it .
It depends on the locations of the magnets.
So far I've made a magnetic car mount that allows for wireless charging. This mount doesn't charge, it's just a magnetic mount. Though what I've done allows it to still fast charge on my Choetech wireless fast charger on my desk. Here's what I've done to achieve this...
I started with an actual mount. I used the Mountech AirSnap
as I like how it mounts to the vent of my car. Many mounts of all kinds will work though.
I then obtained a metal plate cut to 2.5" square. This piece may be the hardest to obtain, but it doesn't have to be metal. It can be ABS plastic. This piece is basically just to create a wider area of coverage. If going the route of Magnetic + Charger, this piece isn't really needed.
Most important thing is the magnets. I used 10 12mm x 1mm N52 Rare Earth Neodymium Discs
Last thing, is a thin case. I'm using the Spigen Neo Hybrid.
I basically just put that metal plate on the Mountech mount. The Mountech's magnets hold the plate sturdy. This could be glued to a mount if need be, but not necessary with the Mountech.
The metal plate has 5 magnets glued to it. One in each corner, and one in the middle. Be mindful of the polarity. You want them all going the same way, and you want them facing up to attract other magnets. Test by stacking. I then sprayed it with 4 coats of Plasti-Dip
to give it a nice look and protective surface.
Put the empty case centered on the metal plate. Put down 5 magnets inside and they will line up with the other 5. Circle them with a pen, and mark them to keep track of the polarity. Take em out, put down a dab of glue in the case for each, then carefully put them back in. Again, mind the polarity before gluing. Once everything dries, your good to go. Just put the plate on the mount, then the phone on the plate. The magnets are quite stong and hold the phone stable. Also since the magnets attract to each other, it's easier to pop it on the mount without looking for the sweet spot to that holds it.
Below is a picture of my case, the mount, and then the metal plate.
Now, to throw a charger in the mix is going to be slightly different. You would need a fast charging "puck" type charger like this Choetech pad.
You would need to open it up and glue the magnets inside of it. Similar to the metal plate. Then close it up and boom! Wireless + Magnetic fast charger.
Trick is in the magnet placement. You can't have anything blocking the charger coils. Placing them how I have works just fine. That charger seems like a good contender to be opened easily enough, and to have room for the magnets. The problem with most magnetic mounts is that they require you to put a metal plate inside your case, which then blocks your coils. Not too mention their magnets are quite weak and poorly located on small surfaces.