battery case temperature

I had always assumed that the battery pack required some heating before high-speed DC charging, but that once the charging got underway most of the noise the car makes was due to cooling. I had also assumed that ~25°C was best for the batteries. See this (admittedly old) post which mentions...

Hi: Does anyone know if the bottom of the Tesla battery case gets hot to the touch during use? I am considering running a conduit to carry a dash cam wire from the rear view mirror to a camera on the rear bumper. I can take a super smooth route directly attached to the battery cover or a...