Qicent Direct via Amazon offers its Qicent 30-watt 4-Port USB Smart Wall Charger in Black for $15.99. Coupon code "Q528289B" knocks that to $11.99. Plus, Prime members bag free shipping. That's $8 off and the lowest price we could find. It features four smart-charging USB ports, an LED indicator, multiple safety systems, and 3.9-foot detachable power cord.