This is a Gridfinity-compatible holder for one Sony NP-FW50. The slot is slanted to make it easier to insert and remove the battery.
There are a few other designs out there but they're all for multiple NP-FW50s, whereas I only wanted a holder for one. If I ever got out of this fortune cookie factory more often, perhaps I would take more photos and I would need more batteries. Maybe I would meet more people and travel to Uruguay. Perhaps I would run into a young child who, inspired by my photo taking zeal, becomes a photojournalist and changes the world. Instead, I just have the one battery.
I printed it in PETG on a Bambu X1C using a 0.4mm nozzle and 0.20mm layer height, but you should be able to print it in basically anything. No supports are required.
The author marked this model as their own original creation.