Battery Question

You are assuming an awful lot here. Notice I said polar and high altitude, the coldest place we deploy instruments is not the poles, it is the stratosphere. For those measurements, we charge the batteries in the lab, on the ground, same way you would in your camper, then use them at ambient temperatures down to a low of around -80C (-112F) but typically more like -70C. Of course we insulate everything, but internal temps still get down around -40C.

But thanks for calling me bud and telling me that the equipment I use doesn't work.

Back to the actual point here - there is no reason you cannot discharge a LiFePO4 battery below -20C.

Grit dog wrote:
^Ok, fair enough. So you are a researcher in Anarctica. (Because the Arctic never gets that cold and by never I mean at least since LiFePO4 batteries have been around)
And apparently you’re out with your instruments on the coldest days of the year or decade in Antarctica. They’re not going to work bud.
I’d like to hear how you operate in -94F temps and colder….I’m just a greenhorn I suppose because much below -50F, nothing runs. At -60 you virtually can’t keep heaters fired to to keep fuel heated enough to fire the heaters to have a place to warm your batteries.
Even in the Arctic you don’t really go outside much below -50F.

Not everyone here has worked or lived above the Arctic circle so your claims may sound impressive but until you can explain the process I’m not buying it.
Oh, you must be a freelancer, because I don’t know of any agency or r company that operates in the Arctic that doesn’t have strict cold weather protocols that shut down virtually everything between -35 and -50F for safety.
But maybe that’s changed since I worked on the Slope in the winter.