Just bumped into a car charger cost only $2.54, which is quite a bargain.it has dual USB ports with 2.1A output, which looks pretty impressive at this price!

I have been using my Xiaomi car charger for a while, it works pretty well. it has quick charging feature with 2.1A output and support for playing music while charging, it is a good purchase for me. but the price is a little bit high even with its good performance.

Link: budget car charger