Ok, here's a two-part conundrum for you.
I drove from Brum to Devon and had 31% battery remaining, having started at 100%.
The return drive, again starting from 100%, used up more battery - I have 21% left.
Questions:
1) Why? Weather conditions were similar, I drove the same style wise. I know Brum is on a plateau and is therefore higher than the coastal towns of Devon, but can that really explain such a discrepancy?
2) On the way back (and this isn't the first time I've noticed this) the range estimate tracked my mileage pretty accurately from Devon to Bristol. The run from Bristol to Brum though was noticeably less efficient. Again, why. Is it more hilly and has more up-and-down-ness? Is there a difference in the road surface? Or is it windier?
I find it quite curious, because it does affect how confident I am in the available mileage in the car, especially if (as in the Bristol to home run) it overestimates the range.