The file 'Julia’s AA-Dapter – AA To C Or Baby Cell Adapter 3D Printer Model' is (stl) file type, size is 944.9KB.
Designed this mainly for the name. It has 3 springy parts that hold the battery in place and should adjust to most AA Battery Diameters. All models I had available fit quite well.
Battery_Adapters_AA_C.stl | 2.7MB |