Is it possible that it operates like a normal tesla (electric) but generates power while in motion? Even if not generating as much power as whats being used, you would still gain extra travel time. I dont know if this is already being worked on, or has been done, but I am just trying to give an idea. If the car used something similar to an alternator but a little bit different, to generate power as it's moving, it would generate some percentage of power back. https://forums.tesla.com/forum/forums/please-tell-me-if-idea-stupid (Submitted by kueves87 on May 12, 2013) Mentioned having another battery that the car switches to "so I'm proposing that the car be designed with an alternator type charging system and TWO batteries each capable of going say 75 miles on a full charge. While the car is on the road it only needs to use one battery for the first 75 miles, and when that first battery depletes, the car can automatically switch the the second battery while the alternator starts charging the first." I know its probably dangerous to have 1 battery that gets used and charged at the same time, so use 2. the batteries would charge by the motion of the car and generate more power by Speed.