This is a simple remix of an existing bauer battery holder, which I've used for storing batteries on the undersides of shelves, but for wall mounting, vertical clearance became an issue when removing the batteries. Angling the batteries made it easier to store the batteries in a tighter cluster.
1.5, 3, and 5 AH have the same front/rear dimensions and will work with these holders. At my last trip to Harbor freight, I noticed they came out with larger batteries, 8 AH I think, and I'm not sure they will work with this.
The author remixed this model.
I added material where necessary to hold the battery at an angle.