I am using a rental car which is a Chrysler Pacifica. Has two USB ports. All I want to do is charge my phone while I drive and continue to use Siri for navigation. This very simple thing seems to be a usability nightmare. It seems like it kind of works as long as I'm willing to listen to music while I do now but if I pause my music no sound comes out of the car or the phone. Including navigation. I think it's stupid that I have to actually listen to music in order to hear navigation. And I don't even particularly need the audio to go to the car sound system. Is there a way to tell the phone to just charge and not attempt to send all of its audio out to a car head unit that might be ignoring it? And why in the year 2016 is this so difficult to get working for such a simple task? And yes I'm aware of the fact that I could go buy one of those charger plugs to plug into the round 12 V outlet while I'm on vacation. But that's stupid. There are two USB ports in this car and I should be able to charge my phone.