I have been experiencing that as my 85D drops below ~40% the car will start to feel noticeably heavier and I would have to step down the pedal quite a bit further than before to maintain the same speed (or to achieve the same acceleration, if possible at all). I am just wondering whether this behavior is controlled by the computer to help reduce power usage, or is it so due to the nature of the battery? My speculation towards the former stems from the fact that I do seem to drive more efficiently at low SoC. For example, tonight from ~35%-20% SoC I drove an average of 280kwh/mi with a 40F outside temperature and wet road from light rain. I would expect something around 330 based on previous similar situations.