Spacer to use single 26650 single cell in a 3 C cell flashlight

This will allow a single 26650 cell to replace the standard batteries in a 3 C cell flashlight. The center hole needs to be filled with a conductor. You can use rolled tin foil or a small piece of tubing with the ends flared like a rivet. Cut coat hanger etc. can also work, just make it flat so the cell doesn't get damaged. Note: some 3 C cell flashlights might be too small in diameter to accept a 26650, you can use my 18650 conversion instead, it is similar.