You may have heard about the the 6,831 lithium ion batteries that power the all-electric Tesla Roadster. But what about the user interface from the driver's seat?
It turns out that the Roadster has a small touch screen to control battery charging. It provides people with the temperatures of different subsystems, and it gives a read of how the batteries' charge translates into range and performance.
It also lets people schedule the charging for late at night, when rates can be lower because demand on the power grid is lower--a very handy feature.