Supercharger, Tesla.

Click tip I: Now that Tesla is charging per kWh at its Superchargers, but prices may vary from location to locations, calculating the cost of a trip is some serious brain exercise. Tesla-owner Ben Sullins has come up with an online-tool to help calculate the total.
tableau.com, youtube.com (video tutorial)

Click tip II: Another Tesla owner has created glowing a charging cable. It lights up depending on the amount of current being drawn by the Tesla. That’s some seriously cool engineering.
insideevs.com, youtube.com (video)