Makita battery holder with 2 holes for mounting.
I needed a 2 hole version for just two batteries and rather than pester Bob to do it, I just did it myself in Prusa Slicer by adding some negative volume cylinders.
I am printing mine now for the first time in PETG so I will let you know how it goes or if it needs adjusting.
The author remixed this model.
I used some negative space modifiers in Prusa slicer to add an extra mounting hole.