But using your own argument, your electricity grid is now dependent on the road "network", so not self-contained. Moreover, I can imagine much worse scenarios t

But using your own argument, your electricity grid is now dependent on the road "network", so not self-contained. Moreover, I can imagine much worse scenarios than what you wrote about the cell tower batteries failing. Just imagine you have a snow storm and now you have to have a electricity company truck drive past people's home to restart their electricity. At least in the case of drained cell tower battery they only need to drive to one location.