One YouTuber has taken Musk's comment to heart and created a gas-powered range extender for his Tesla. 

YouTube channel Warped Perception said in the video's description he built the "first ever Cordless Tesla" powered by a small gas power plant generator on the back of his Model S.

"This is the first version of the cordless Tesla which is burning gasoline to charge the car instead of the conventional plug-in charger," said Matt Mikka, who runs the YouTube channel. 

Mikka told Bussiness Insider: "I really like my Tesla, but what I don't like is stopping to charge, especially on a road trip. I don't even like stopping to fill up my gas-powered car, and that's way faster than charging."