Top Greener Inc via Amazon offers the Topgreener Dual USB Charger Outlet 2-Pack in White for $30.38. Coupon code "IE8TDG5R" cuts the price to $24.30. Plus, Prime members bag free shipping. That's $40 off list and the lowest price we could find. They have a 4.0A, 5VDC combined charging capacity. Deal ends August 22.