So here is Elon Musk on how a battery actually charges itself for the really good example. The charge that tapers off as you get above 80% right now. Here is cars in a parking lot so that the lithium ions are trying to find a parking space as they as they move across from one side of the batteries to the other side.

As these ions are just bouncing around looking for a parking space where the parking lot is empty, its carmakers zip right in there and find a spot as easy as the battery gets it closer to full. It’s harder and harder to find a spot. They have to bounce around more. Doesn’t this make a gasoline car more efficient? 80 versus 100%.

And if people should get electric cars because they don’t have any emission, doesn’t the power plant making the electricity also produce emissions?

watch the full video here: