I have had my iPhone4 since March. I am new to this type of unit. I have downloaded Sirius to my phone and would like to use it in the car. The easiest way to use it is to just plug the Aux jack into the headphone jack and voila, music through my radio. It would take an extra step to plug in the charger. Question: If I choose to NOT plug in the charger (because its about a 45 minute ride to work)...will I damage the battery with all the discharge and charging? I am just lazy and don't want to feel that I have to plug in the charger each ride in the car.