I did a Google search for this but all I could find was stuff about phone chargers draining the car battery. What I want to know is if there has been found any correlation between using a car charger (USB or cigarette lighter style) and the battery life of the device being charged being lowered by this usage. Especially if there's been a study or testing done, although personal experience is passable as well. Can't say I have personal experience with this, though my phone did seem to die faster after I started using a car charger, but then again my phone is super old and may just be naturally losing charge. Any feedback appreciated! I'm just curious about this topic.