Tronsmart has discounted one of its more popular car chargers today, it's a dual USB Car Charger that has USB-C as well as Quick Charge 3.0 included. It is typically $14.99, but with the promo code ZUBOQZWH you can get an additional 15% taken off, bringing it down to around $12.75. That's not a bad price at all for a dual-USB car charger. Of course, this promo code is good through November 3rd only.
This car charger from Tronsmart has a built-in USB-C cable, so you don't even need to worry about supplying your own, if you have a USB-C device like the Galaxy S8, LG V30 or Pixel 2 XL. There is a second USB port which is a USB-A port and it'll work with really any USB cable, whether that's micro USB, Lightning or something else. It is compatible with Quick Charge 3.0, so you can charge your smartphone quickly while on the road. Remember that Quick Charge 3.0 is backwards compatible, so even if your smartphone doesn't support it, you can still use that port without damaging your device.
This is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap next-day shipping if you need it here extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime by hitting the link below. You'll get 30 days free (if you're a student, you get 6 months), and then it's $99/year. Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits.