Ntonpower Direct via Amazon offers its Ntonpower Triple USB Cup Car Charger for $13.99. Coupon code "9S5UBIAM" drops it to $9.93. Plus, Prime members bag free shipping. That's the lowest price we could find by $9. It features three USB ports, two 12-volt DC sockets, and fits in most car cup holders. Deal ends November 30.

Update: The price has since dropped to $8.51 after the coupon.