Staples offers the PowerXcel 6-Outlet Wall-Mounted USB Charger, model no. SOU-12/6000, for $9.99. Plus, Staples Rewards members bag free shipping. (Not a member? It's free to join.) That's $3 under our mention from a month ago and the lowest total price we could find by $4. It features six outlets, two USB ports, and 2.1-amp rapid charge.