Car adapter charger, as an important accessory of automobile electronic equipment, car adapter charger, referred to as car charger or car charger, is a kind of direct power supply through the automobile cigarette lighter interface or battery, the voltage of the automobile power supply (usually 12V or 24V DC) is converted into a device suitable for all kinds of portable electronic equipment (such as cell phones, tablet PCs, navigators, etc.) to charge the required voltage and current.