Car charger 2.4 volts is not good, the voltage is too low. The input voltage of the general car charger is 12V for cars and 24V for trucks.
The car charger is an accessory to facilitate the owner to charge digital products anytime and anywhere with the car charging source. Some high-end car chargers generally include 2 USB interfaces, which can charge two digital products at the same time. Car charger in the car at the same time, but also home, to achieve car charging, direct charging, USB charging three-in-one multi-functional use.