Soundcore Life A1 Magsafe adapter

I suggest printing at 0.1 or less. I did mine at 0.08, 1 wall, 100% and it fits great. The additional grooves are supposed to help with glue overspilling to the sides. I used a basic 2 part epoxy. You should clamp the adapter to the case as the glue dries to prevent any gaps.

These couple of magnets won't hold the charging case on a vertical or very steeply inclined charger, but if you are being reasonable it works great.