Battery temperature too low warning

Within this context
I use my F4 as a bicycle navigator. Recently it was pretty cold and the phone asks me to switch it off due to cold temperature or whether I want to ignore it. Since I was somehow lost, I ignored the warning and got home well.
So my question is, what will happen by ignoring the warning. By the way, the phone was in a very prominent position in front of my bike. And since then I put the phone in my pocket and listen to the advices of the navigator. Sometimes quite annoying.