Your Tesla can charge at around 250 kW when the battery is nearly empty and drop as low as 15 kW when it's nearly full, on the exact same charger. The car slows itself down on purpose, because if it kept pushing, it would start turning part of your battery into solid metal. Elon's parking lot comparison is closer to literal than it sounds. The negative side of the battery is made of graphite, which is basically stacked sheets of carbon, and charging means shoving lithium in between those…