Does anyone make a pass-through that works off of a 12v cigarette lighter for while you are driving. I just spent the whole morning trying to make one. I found an old phone charger that was 3.7 volts. After I got it together I hooked a volt meter to it and got 3.7 volts when I hit the switch. When I put an atomizer on it I got nothing. I noticed that the light on the 12v adapter would go out every time I hit the switch. I guess there must be something in it that shuts it down if there is an overload. It sure would be nice to have one to save batteries while I am driving, but I never have seen one advertised anywhere. Has anyone seen one?