Hummm, mine was reading -3F yesterday. It was really hard to start. Drove 15 minutes, stop for 30 minutes, then it did not start
dead battery. Charge it just enought to start and head back home. I dont know how old is the battery but at least 3 years, so I guest it's time to change it because winter is just starting
Have charge it all night and I need to drive 30 minutes tomorow to go skiing, I should be fine
Later all
Chris