Slim AirTag Wallet Case

This is a simple housing to modify an Apple AirTag so it fits into a wallet's credit card slot. It’s only 3mm thick and works with one or two CR2025 batteries.

The case is designed to be water-resistant (I keep leaving my wallet in the wash). That said, the level of waterproofing depends on how well the glue seal is applied.

Print both parts (case + lid) and glue them together. I use Pattex glue with ABS filament because it holds well but can still be undone to replace the batteries. Acetone + ABS works too, but fully fuses the parts so they cannot be undone.

Print Settings

Material: ABS

Layer height: 0.12mm (Fine) on Creality K1 (0.4mm nozzle)

Walls: 5 loops

Top layers: 5 (rectilinear)

Bottom layers: 5 (rectilinear)

Infill: 30% (rectilinear)

Other Materials

Adhesive: Pattex Kraftkleber Classic

Wire: 0.8mm (non-Teflon)