Newegg offers the RAVPower Bolt 4-Port USB Charger in White, model no. RP-UC07 for $14.99. Coupon code "EMCWPPW58" cuts to $11.49. With free shipping, that's a buck below our August mention and the lowest total price we could find now by $6. It features two 2.1-amp outputs and two 1-amp outputs.