Panasonic NCR18065B +End Magnet Diameter

Anyone know the max diameter of the positive end terminal of the NCR18650B flat head?

I need some magnets for a 18650>2D Mag conversion, and I’d like to stay with flat-tops for battery interchangeability of various 18650 power products.

Can’t find my calipers.

7mm fits nice. 8mm max

Cool, thanks man.