As one of its daily deals, 1Sale offers the Lenmar Dual USB 4.2A Car Charger, model no. AIDCU4, for $7.99. With free shipping, that's the lowest total price we could find by $7. It's equipped with a fuse to protect from overcharging, and both ports have 2.1A of power (most duals have 1 port at 2.1A and the other at only 1.4A). This lets you charge two tablets at once. Deal ends today.