I needed pegboard holder for Ryobi One+ batteries and there were many great ones already made by different people, but I found @cregory83's most suitable for my needs. I simple changed hole sizes and locations to fit Biltema pegboard.

Biltema pegboard holes are 4mm wide and 12mm abart from each other and it is sold in Scandinavia, but there are other brands around the world with same diameters.