I was building a circuit that required 5v and was planning to use little watch batteries. While testing I could hold them in my hand and connect the leads but that got to be a pain. So I grabbed some odds and ends and made a quick simple battery holder.
Step 1: Supplies
I grabbed some plastic canvas from another project, the batteries and some rubber bands from my kids braces.
Step 2: Keep It Small
I cut a piece of the plastic canvas making sure to make the piece smaller than the battery pack height and width. I also tried to keep the fingers of the canvas long on the piece I wanted to use.
Step 3: Around First
Curving the canvas and adding some rubber bands made it easy to slide the batteries in place.
Step 4: More Rubber Bands
Adding more rubber bands made the pack secure and provided a nice place to position the leads.