My N40s were delivered at -18°C (0°F). Now what?

[Oli]

Now what?
Who’s on first?
I’m sure there are many lights stored in much colder conditions.

Freezer testing -10F,-30C 12 lights, mostly 18650

The freezer was set for -2° F. Two thermometers in there were reading -10F and -30C. I did it in two batches. The first batch of nine lights was left in for 30 hours. Before placing them in, I turned all of them off while in the lowest setting so that they would come on in the lowest mode. I immediately clicked or ramped up to the highest setting on all lights when taking them out one by one. None of them would go to the highest turbo. They did all appear to get to a good high setting except f…