I have a couple of questions. My kids want me to spend the summer up in Colorado with them. I could be gone 2 to 3 months. I have a battery tender that I will keep on the 12 volt battery. Is there any problem leaving the Smart ED that long without charging the traction battery. Wasn't sure how long before it might discharge too far. 2nd question is they make a cigarette lighter adapter so you can just plug the tender in to that but not sure if it will work on the Smart. Not sure if it's hot with the key off. Thanks in advance.