Making your own battery holder is relatively straightforward especially if you need an easy battery holder for card or papermaking activities.
Chibitronics suggests 5 ways to create an easy battery holder this is the first way with foam adhesives.
This battery holder is super thin and easy to build. However, since your battery will be taped into the holder permanently, you won’t be able to switch out the battery without taking the holder apart. Lots of creators have made this holder with thicker foam so that you need to press on the battery to turn on the lights. This makes a handy on-off switch while also helping to save power on your battery!