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I wouldn't even try to start mine at -40 without being plugged in, ouch! Hurts just thinking about it! I just leave mine running if it's colder than 15 above.
When you got to go you got to go, and since I end up out in the boonies alot with no power, and no cell signal, I need to know if my batteries are weak before I get there. That way I can get new ones before I am walking in -40.
Yea, but when its that cold even plugged in the tranny is still -40 so you still have to let everything warm up anyway.
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