Yangdock via Amazon offers the Lumsing 48-watt 4-Port USB Car Charger in Black or White for $12.99. Coupon code "HIGHDEAL" cuts it to $7.79. With free shipping for Prime members, that's the lowest price we could find by $2. It features Quick Charge 2.0, which delivers up to eight hours of use from 15 minutes of charging. Deal ends May 14.