They make heated lithium batteries that have internal temperature management. Self heating and insulating. Of course more money...
I was literally just geeking out on this yesterday. I wanted to go lithium for it's better features, but drops below freezing in the mountains and I didn't want to grenade my new battery and mess up my trip if it got cold.
First line of questioning I investigated - was there a temp sensitive heater that could use the battery power. Short answer yes. Slim little pads mounted to an aluminum heat sink plate, temp regulated and works decently well. It wouldn't work for a battery stored for a period of time because it would kill itself in pretty short order, even in an insulated enclosure. Too finicky and wouldn't want it on my mind.
About to give up and stumbled on the ones that will shut themselves off and not accept a charge below freezing. OK, well, that is ok, but they can still work to well below freezing, so you would again use the battery but not be able to charge it. Defeats the purpose.
Then the - LT batteries popped up or Low Temp. Ding. It approaching freezing temps, the battery uses the first part of the charge to warm itself instead of getting a harmful charge. Freaking genius. It means some reduced charging time because it could warm itself for an hour while you are driving from one place to the next or have spotty solar connected to it. So I'd imagine keeping the battery somewhere out of the cold, or insulated would combine to make a best practice.
Plus they aren't that much more expensive.
Great stuff Lilla