Engineers took a BYD apart bolt by bolt, and the numbers shocked the auto industry. One teardown found the BYD Seal costs about 15% less to build than a Tesla Model 3. Another opened up the batteries themselves and found two completely different ideas of what an EV battery should be.

In this video from Invention World, we go inside both teardowns to see how BYD pulled it off. We cover why BYD makes about three quarters of its own car, why its Blade battery runs far cooler than Tesla's 4680 cell, and where Tesla still comes out ahead. If you think Chinese EVs are just cheap, this video may change your mind.