What is the normal voltage after a car starts?

1 Answers
VonJackson
07/30/25 8:38am
After a car starts, the normal voltage of the battery is 12V, but in reality, it is higher than 12V. The car battery is always in a floating charge state, with a floating charge voltage of around 14-14.5V. Below is a detailed introduction about the battery: Overview: The battery is a type of cell, also known as a storage battery. The working principle of the battery is to convert chemical energy into electrical energy. The usual battery refers to a lead-acid battery, which is mainly composed of lead and its oxides as electrodes and a sulfuric acid solution as the electrolyte. Others: The plates of an ordinary battery are made of lead and lead oxides, and the electrolyte is an aqueous solution of sulfuric acid. The main advantages are stable voltage and low cost. The disadvantages are low specific energy (i.e., the amount of electrical energy stored per kilogram of the battery), short service life, and frequent daily maintenance.
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