Epicka Store via Amazon offers its Epicka Universal USB 4-Port Travel Power Adapter for $19.99. Coupon code "B4FZGKP8" cuts it to $12.99. With free shipping for Prime members, that's tied with last week's mention and the lowest price we could find by $10. It accepts US/EU/AU/UK plugs, works in over 150 countries, and features four USB charging ports. Deal ends June 17.