So, how long do you guys go between drives before it's time to hook up to a trickle charger? A week, two, three, a month? Reading the manual, there's not any explicit guidance provided. It does say that certain systems will be automatically shut off (like interior lights, power seats, etc) if the car sits idle long enough ("several days or weeks"), but there's no guidance that I read regarding how long before a charger should be used. I've got my charger ready to go, and I guess there's no real harm to hook it up whenever... but I was curious nonetheless.