Aukey Direct via Amazon offers its Aukey Qualcomm Quick Charge 2.0 USB 2.0 Dual-Port Wall Charger in Black or White for $12.99. Coupon code "UYHOLG2W" cuts it to $5.98. Plus, Prime members bag free shipping. That's $14 off and the lowest price we could find. It adaptively charges most 5-volt USB-powered devices and features built-in safeguards and a foldable plug.