Is a battery classified as AC or DC?

Batteries are classified as direct current (DC) sources. This is because they produce a steady flow of electric charge in one direction, unlike alternating current (AC) systems, where the flow of electricity changes direction periodically. A battery's chemical reactions generate a constant voltage, providing a consistent and unidirectional flow of electrons, which is characteristic of DC power.

In contrast, AC power is typically associated with power distribution systems, such as those used in households and businesses, where the current alternates direction at regular intervals. Therefore, the nature of a battery inherently aligns with the properties of DC, making it accurate to classify batteries as DC sources.