^ FWC, why do I feel like you’re being intentionally vague just for the sake of argument?
You use lifes at -30 while camping but not in your camper. So what other possible applications are there and what are you using them for. Snomachines? Jumpstart pack? Headlamps? Off grid cabin battery bank?
How do you warm them to charge them? At -30 I’ll go on a limb and say that the discharge isn’t going to warm them enough to charge, or even if it does, charging won’t maintain them at 60deg warmer than ambient unless you’re heating them externally somehow.
If I’m wrong, please explain, as I’m always interested in learning something new.
And OP, I’ll apologize for all of us for the thread jack…