I had to boost my cruze today as its cold AF (-35C) out here in Northern Alberta, Yes the car was plugged in all day! Yesterday the car had a slow start and was able to get running on its own. Just have a couple of questions, how long are the glow plugs supposed to cycle? Has anyone one looked into a battery warmer or know of any that are available as it will help with cold starting. And has anyone gotten a battery with a larger CCA rating?