They also make a battery heating pad for the battery to sit on. I used a
battery blanket with a heating element and a block heater down in the
Wisconsin Banana Belt (just north of Illinois).

I thought that gasoline fueled block heaters were common in Alaska.

Michael A. Terrell wrote:
We used a battery blanket, lower radiator heater and dipstick heater
to be able to start engines at Ft. Greely.