Several types of USB car chargers can work with many types of electronic equipment. A single-port charger is a small device with only a single USB connection. Multiple USB port chargers are larger and can simultaneously connect to multiple devices.
It can widely used in all kinds of cars, vans, SUVs and other vehicles. There are single USB car charger, dual USB car charger and multiple ports car charger according to the qty. of USB ports.
A multiple-port charger is more expensive than a single-unit charger. These chargers include multiple input ports. Having this type of USB car charger provides more flexibly for people who use multiple devices while on the road.
Clasiffy it in a different way like charging speed. We have normal USB car charger with 5V 1A, 5V 2A, QC 2.0 car charger, QC 3.0 Car charger, type C car charger. These kinds of car charger with quick charge is much more expensive than normal usb car charger. But they can charge your cell phones or ipad, ipod in a shorter time.