Just a heads up, I currently have 2 ‘middle’ sections (one AAA and one AA), a top, and a bottom and the whole unit is currently just over 6.25" tall.  So depending on your shelf height and how many batteries you have you may want two separate units instead of one big one.  Original thought was that I would make the whole thing look like a battery but I ran low on black and was impatient so I just printed more with orange.