Today I checked my battery pack capacity by using the data provided in the "Since last charge" tile and found i was down 5kWh of capacity. First here's how I do the calculation: Miles driven * Energy used per mi divided by the change in SoC. For me the numbers were 72.8 mi * 319 Wh/mi/(.9 - .57) = 70373 Wh. I have a P3D and about 5400 mi on the car. Can others do a similar test and calculation and post your results for comparison.