I saw this on lumber jocks a few days ago and immediately knew that I had to build one. Luckily the plans were available free from here. The vertical slats are all identical pieces of 1/2″ poplar. The spacers along the back define the width necessary for each type of battery. All the pieces are just glued and clamped together with no fancy joinery required. The space where the D batteries go has no back spacer to provide the additional depth for that size battery. Both sections are then glued to a piece of 1/4″ birch plywood. A piece of acrylic plexiglass serves to keep the batteries contained as well as providing a window into the dispenser.