Kensington PowerBolt Duo 3.4A 2-Port USB Car Charger for iPhone 5 for $4.99 Shipped

Kensington PowerBolt Duo 3.4A 2-Port USB Car Charger for iPhone 5 for $4.99 shipped after this $30 rebate.  Here is a screenshot for your reference.  It features two USB Ports for a total 3.4A available charge with one port provides 2.1A charging for iPad and other high power devices, and the other port provides 1A of charging for iPhone5.  Most places have it for about $30.