Amazon currently has Spigen's very popular, Quick Charge 3.0-compatible Car Charger on sale right now for just $9.99. That's a great price for this car charger, since it is a Quick Charge 3.0 car charger, and those are usually around twice the price or more.
This car charger is a 30W charger, and has two USB ports. There's a regular USB-A port that can charge at up to 2.4A, and then there is the Quick Charge 3.0 port (the green one). This will charge up your smartphone pretty quickly, at around 3A. Remember that Quick Charge 3.0 is indeed backwards compatible with Quick Charge 2.0, Quick Charge 1.0 and even conventional charging. This is a great charger to pick up, since it does have two USB ports, so both the driver and the passenger are able to charge their smartphones at the same time, while you're on the road. It doesn't get much better than that.
This item is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap (usually $3.99) next-day shipping if you need it extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime. You'll get 30 days free (if you're a student, you get 6 months), and then it's $99/year (or $49/year for students). Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits.