iMateWeb offers the 4-Port USB Wall Charger for Mobile Devices for $9.29 with free shipping. That's pennies under our mention from last week and a buck less than the lowest total price we could find for a compact 4-port USB wall charger of this design elsewhere. It features folding prongs, two different plug orientations, four USB ports, and more. It works with most electronics that use a USB charging cable.