This is my first Gridfinity design. After printing the gridfinity 1x2 D battery block by BenBreaksThings I was looking for a similar holder for some C sized batteries. 

Designed the model in Autodesk Fusion 360, following the sizing from https://gridfinity.xyz/specification/ and the original Divider Bins parametric source file from ZackFreedman https://a360.co/3vbu9B5

Printed in PLA. 0.2mm layer height. 15% infill.