davewill wrote:I arrived there approx 2 miles into "Low battery"
So, you had, generally, 10-13 miles left...
I plugged in (L1) for an hour and a quarter... Ten miles and 400 feet down and back up, and I arrive at home.... I was expecting "Very Low Battery" any moment.
The L1 might have gotten you an additional 7-8 miles on top of the 10-13 you had, for 17-21 miles total. Then you drove 10. You had plenty of reserve !