For its newsletter subscribers only, newegg offers the 4-Port USB Wall Charger for Mobile Devices, RUC-6181, for $19.99. Coupon code "EMCYTZT2104" cuts it to $9.99. With free shipping, that's the lowest total price we could find by $5. It works with most electronics that use a USB charging cable and includes adapters that allow it to be used in North America, Europe, Australia, and over 150 other countries. Coupon ends August 26.