This $6 Car Charger Is The Smallest You've Ever Seen

There are more powerful car chargers out there, and options with more USB ports, but if your primary concern is finding one with as low a profile as possible, you won't do better than this $6 option from Aukey. It's so small, it'll look like it's built into your car. [Aukey 24W/2-Port USB Car Charger, $6 with code J57C7L93]