My understanding of the power adapter build is that they need special-ordered parts for it, which is why it hasn't dropped in price... ever. The good news, though, is that they sell a special car cable. One of the nice things about having the detachable cable on one side of the PA housing. As for how discreet that is, not very... if you're vaping and driving. Good for camping out, though, or when you can't stop for a few hours to recharge.