SharkStores offers the Liger High Output 3-Port USB Car Charger 2-Pack in Black/Silver, White/Blue, or White/Silver for $13.95. Coupon code "SDLIGER3USB" cuts it to $9.95. With free shipping, that's $4.50 per charger and the lowest per-unit price we've seen. (It's a current price low by $12.) Each charger features three 3.1-amp ports. Deal ends August 5.