Electrek isn’t the best resource, but the original information is from like an 1-hour 40-minute Youtube video (as well as a 5+ hour livestream test of the Cybertruck’s range). Link in the Electrek article.
The 254 mile highway range test is perhaps the most troubling issue brought up so far, and even pro-Tesla outlets like Electrek is bringing it up as an issue.
And the extender sits in the bed of the truck…
You know, the part that you need if you need a truck…
Edit:
I saw a video which led me to believe that the range extender goes in a compartment under the bed, so it doesn’t affect cargo capacity. Am I wrong?The article says the range extender takes up cargo space. Huh. Well, it’s not like I was in the market for one of these stupid things anyway.