The pack voltage is very stable across most of the capacity percentage. If you never get near the top and near the bottom of capacity where voltage does begin to change rounding errors compound and it artificially makes it look like range has gone down. Haven't seen anyone report the rounding errors go the other way
If you are running the car way down to where voltage begins to drop the car isn't going to stop based on the miles displayed when you started, it will likely begin to reduce "range" by less than what is being travelled. Point being the rounding errors aren't hurting anything but your anxiety.
I went thru this and repeatedly ran the car way down and charged to 100% and regained some displayed range and just made myself worry too much.
My advise is stop worrying, even if it is real degradation nothing you can do about it till to crashes to the 70% warranty point.
Hmmm, wonder what's up with mine then
Just add 10% to your 90.
That's not correct. A closer approximation would be to add 11% to the stated range at 90
seems like the right thing to do, but it didn’t work for me, some other guy in the other tread, was charging to 50% drained down to 10% and back up to 50%, he got better results, I am doing the same but at 52% I am getting some range back.That's not correct. A closer approximation would be to add 11% to the stated range at 90% charge.
But as already pointed out, the stated range at any given charge level is just an approximation that can drift if you have been operating the car in the middle of it's range for a few weeks. The solution is to run it down low and then charge it up to near full so the Battery Monitoring System can more accurately determine the stat of charge.