My 90% has recently descended down to 233 miles from 237 so I thought I would give a 100% charge a try. My car has 2400 miles on it. Last night I came into a supercharger at 8% and thought why not? I had another 75 miles left to burn off so I thought it would be a good time. At first the timer said 1 hour and 10 minutes which I thought was good. I was the only one at the supercharger. After a few minutes it ascended to 120 minutes but still I thought OK. Well after about 1 hour 10 minutes I was around 90% which was about normal. Seemed to be at 238 so maybe I picked up a mile. I kept going. At around 1 hour 30 I was at 257 which is what the 90D is rated at 100%, but I am still not fully charged. I kept plugging away but now the amps are in the single digits. For another 1/2 hour I waited for it to get to 100% and stop charging but it never did. The amps decreased to 2, but at that rate it could have been at least another 30 minutes, if ever, before it got to 0 amps and 100%. I unplugged and drove off with the battery showing 259 RM. I also reset the charge back to 90%. When I got home, after burning off about 75 miles, I plugged in and since it was late the charger got right to it (I have the car set to charge at 11 pm). The next morning I got an alert that the car was fully charged to 234. So I was back to the same 90% state before I did the full charge. So three questions: Would the car ever reach 100% charge at a supercharger or at a HPWC? Should the 90% RM have gone back up to 237? What is the correct procedure to get the RM back at 90% or did I really do that when I got it to 259 RM and my 90% at 237 was just some fictitious number during during the first 1500 miles?