Etekcity via Amazon offers its Etekcity Dual USB High-Output Wall Outlet Charger for $14.95. Coupon code "ETEKANON" cuts it to $9.95. Plus, Amazon Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, it adds $6.98.) That's the lowest total price we could find by $3. It features dual USB charge ports (5V/2.1A max), LED charge indicator, and foldable AC prongs.
Tanga offers the PhoneSuit 2,600mAH External Battery Pack for $29.99 with free shipping. That's $40 under list and the lowest total price we could find. The battery pack is compatible with smartphones, tablets, and other micro USB gadgets.