I feel like everyone's missing the point. Even 20 minutes a week is almost a day a year of your life sitting at a charger. I fill up my gas tank once a week and it takes maybe 5 minutes which is 4 hours a year that I spend feeding my car, staring at the stupid advertisements for a bacon-egg-and-cheese cinnamon roll covered in maple syrup or whatever other impulse items lie within the gas station. 5 minutes isn't enough to do anything whereas if I plan for 20 minutes, I'm going to go get a tea or something.

On the other hand, something we can all agree is a waste of time is, "how many hours of your life have been/will be spent sitting at a traffic light?"