4S 21700 Cell tray

This will hold 4 21700 cells, and has cutouts so you can sport weld/solder 0.15x6x50mm nickel strips to each cell. It also has a hole in the middle so you can route the wires accordingly so they are not hanging out of the battery once its finished. I used this to create a 4S 4000mAh battery for my drone.