I went for a cruise last week and left my almost fully charged X90D (409 kms) in a heated garage where the average temperature is 25 C. I did the usual good things to save energy before I left so no need to inquire....To my surprise, I came back 9 days later with only 339 kms of range. I expected a loss, but not that much. I wonder if I had left it outside with close to zero C average temperature..... Food for thought