Tensun via Amazon offers its Tensun International Travel Plug Adapter with 2 USB Charging Ports in Black for $15.99. Coupon code "YCD6Z5GH" cuts that to $11.95. Plus, Prime members bag free shipping. That's tied with our mention from two weeks ago, $4 off, and the lowest price we could find. It features four built-in plug standards (US/EU/AU/UK), a detachable standalone charger with two USB charging ports (two with smart charging), and a slide-out plug release button. Deal ends December 31.

Note: There's also a 4-Port version in Blue or Black for $17.99. Coupon code "AIUE53QQ" drops it to $12.99.