Sunvalley via Amazon offers the RAVPower 36-watt 2-Port USB Car Charger in Black for $9.99. Coupon code "DEAL0909" drops it to $7.99. Plus, Prime members get free shipping. That's tied with last month's mention and the lowest price we could find by $4. It features iSmart 2.0 smart charging technology, dual USB ports, and multiple built-in protection methods.