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Tesla exaggerating EV range for over a decade
(arstechnica.com)
This is a most excellent place for technology news and articles.
The MPGe Tesla advertised also is. Then they use that to correspond to % remaining battery.
All EVs get wildly different range depending on outdoor temps (I get 30% lower range in winter) and their hysteresis is way higher than an ICE car. But, their range numbers are accurate for when they are measured under ideal circumstances.
I regularly do better than rated range. Others have a heavy foot and do worse. Kinda par for the course.