David, it's just something I've gotten used to doing. I do like the fact that by charging the battery I will get a bit more mileage but also I want my car to be in gear almost all the time. You never know when you might need to give her some gas to avoid something or someone. Down here in Florida where half of the people are a hundred years old and the other half don't have auto insurance or a drivers license it pays to be able to get out of the way quick!