Auto-Vox via Amazon offers its Auto-Vox 4-Port USB Front and Rear Seat Car Charger for $13.99. Coupon code "KL6BFSDD" cuts that to $7.79. Plus, Prime members receive free shipping. That's $5 off list and the lowest price we could find, although we saw it for a buck less in August. It features four 2.4-amp smart ports: two for front passengers via a DC adapter and two for rear-seat passengers via an attached 6-foot cable and adapter. Deal ends February 15.