I try searching through the forums, but I didn't know how to actually put in, so didn't really find anything. So excuse me if this is obvious.
Here's my question: If you use the car cigarette lighter to charge something (lets say a laptop or cell phone) does it use the car battery if the car is running? If the car is not (the key is in, let's say, my hands) or should I use it with the key turned one bit (like when you ust want to listen to the radio)?
The reason I'm asking is, I have a little stove that can be pluged in an electric output and I would like to buy an Electric to 12V adaptor to use it, but I don't want to kill my car battery.