I have a 12.8V 12Ahr Lithium battery but I wanted to avoid a mess of wires when using it in the field so went looking for a box to house all the bits.
Annoyingly hardware stores don't seem to list the internal dimensions of these boxes on their web sites but I found one at Bunnings for $35 that is perfect.
Not much to this project. There's an in-line automotive fuse holder, I've fitted a 30A fuse for now. A nice big switch and a panel mount Anderson connector.
The fit is tight enough that the top of the case presses a little on the top of the battery and stops it moving around.
Next step.... SOTA!