So I thought I should check out the "MAX RANGE" charging mode on our Model S (85kWh battery) before needing to use it in earnest.  Relative to the STANDARD mode, it increases rated range from about 235 Miles to 270 Miles.  I noticed that the charging slows down gradually over the last 40 minutes of charging.  In STANDARD mode, it charges at the full rate until the very end.  Not that it really matters... ;-)
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