Battery ....RIP,......... Death By Polar Vortex??

My local Car Quest is now an Advanced Commercial. I've got 2-3 of those exact batteries in various vehicles with the oldest being 4-5 years. It was -9 here this week, about -30 with the wind. No issues with any of them. Most important thing is make sure the date code is recent. I've sorted through batteries in Auto Zone and Tractor supply before to find the newest. They are not usually rotated like they are supposed to be. My CQ guy knows I want a "new" new one.