What happens if I run out of electricity?
This is a very rare problem. Your car will give you plenty of warning before completely running out of juice. In that situation, if you are worried about getting to your destination, slow down to save energy. Then pull over and fire up your app to look for the nearest charging station and plug in.
If your car does die, you will need to have it towed to a location where you can recharge. This is very similar to what happens when you run low on gas.