If I say I want to go to X destination the car says I will arrive with Y battery percent left. This is accurate to me within about 5% of the battery, even driv

If I say I want to go to X destination the car says I will arrive with Y battery percent left. This is accurate to me within about 5% of the battery, even driving at fast highways speeds and in cold weather. If it was "cheating" I think I'd notice an issue when the car said I had 5% left but the real battery charge was empty.