Designed to fit Bauer 20V 1.5 or 3Ah battery attached to Bauer 20V Cordless 150/300 Lumen Compact Flashlight.
Works well to light up my closet.
Mount/holder has two #8 countersunk holes for mounting.
Model should be printed upright, with supports only required to print mounting holes.
Printed with 100% infill it's pretty solid.
Links to battery and light that this is designed to work with:
https://www.harborfreight.com/20v-15-ah-lithium-ion-compact-battery-63530.html
I have only printed the one with the 1.5Ah battery and it works great, if for some reason the 3Ah doesn't fit as well, please let me know.
These can also be used simply to store the batteries, as shown here:
https://www.printables.com/model/215779-harbor-freight-bauer-20v-battery-holders
The author hasn't provided the model origin yet.