This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/9uV8aZUop70
This battery holder is helpful for e-textiles because conductive thread is in contact directly with the battery on the + and - sides, then can be routed through the side holes and affixed to the fabric through them. No extra conductive materials are needed!
UPDATE: "V2 multiple" file is updated. Added hole in back to push battery out. Added holder version for hot gluing onto projects. Negative circuit wire can be inserted into - slot in top as battery is pushed in. Removed wedge on lip that made it hard to slide battery out.
Print it as oriented, standing up. I've had good experience printing it this way, even with the hoops having an overhang. If you print it laying down the top will cave, so not good. Printed with supports is not good, either, as the battery slot will be hard to clear out.