This is a AA battery holder that is designed to work with the spring clips listed below.
uxcell 20 Pcs AA Battery Negative to Positive Conversion Spring Contact Nickeling Plate 26.5mmx12mm https://www.amazon.com/gp/product/B07HRSJ5PL/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Category: HobbyThe author marked this model as their own original creation. Imported from Thingiverse.