I have a 450+ Gen3
The promised range (based on my habits) in Ride mode is 75km. The advertised range was 70km
Last week I full charged and reset the trip meter.
Did the usual riding, no special hypermiling or anything.
Today I’m left with 5km, and the total travelled distance is 73km. Looks like the calculation is also keeping in mind the idle drain (which has sipped approx 10-15%)
The battery management and range prediction is amazing!