Is the voltage measured from the cigarette lighter accurate?

[McRylee]

There is always a slight error when measuring the battery voltage through the cigarette lighter, so it can only serve as an auxiliary tool for daily voltage reference. It is recommended to use a multimeter to directly measure the battery voltage for the most accurate results. When the vehicle is not started, the cigarette lighter uses power from the battery. After starting, it uses power from the generator. Here is some related information about the cigarette lighter: 1. Meaning of the cigarette lighter: The cigarette lighter is a component found in all cars, designed to provide a flame source for smokers. 2. Classification: The commonly referred-to cigarette lighter can be divided into those that draw power from the car's electrical system. Some manufacturers produce cigarette lighters not for lighting cigarettes but for drawing power from the car, which are also called cigar lighters.