I used to get 40miles on a full charge, but now in the last two weeks a full charge only gets me 32 miles on the battery reading. I called the dealership and they said the weather affects the amount of charge. We live in A A and it has gotten colder during this time…but a 20% decrease was unexpected. Same charging 240v unit at home…does everyone think it’s the weather change and should I expect it to go down further when it gets colder?