Currently, I drive an older Honda CR-V and I use a "cassette" to play audio through the car speakers with my iPhone 6+. I plug the cassette jack into the headphone jack and the lightning Cable into the lightning port. Often, I charge the phone while using the cassette jack to listen to audiobooks while driving to work or using Maps for directions. Any suggestions on how to play audio and charge the 7+ while I'm in the car? I can't afford a new car .