[davidwhodge]

This would seem totally reasonable to me. It'll take more time, but I can also dig in and see the extent of the battery heater use.

My guess is it's often cold enough for the battery to need to warm up to be efficient, but not cold enough to make it worth it to turn on the battery heater. (Your point still holds in that case)

A piece of data I happen to remember, far fewer than 10% of supercharges have the battery heater on for any period of time at all.