Which type of current is typically used in batteries?

Batteries are designed to provide a steady flow of electricity in one direction, which is known as direct current (DC). This means that the voltage and current remain constant over time, allowing for a reliable power source for devices that require consistent energy input, such as flashlights, remote controls, and many electronic devices.

In contrast, alternating current (AC) periodically reverses direction, making it suitable for power transmission over long distances but not practical for battery-powered applications. Reactive current is associated with reactive components like inductors and capacitors in AC circuits, while pulsating current refers to a form of current that varies in amplitude and is not stable, which is also not typically associated with the output from batteries. Thus, the use of direct current in batteries aligns perfectly with their function and application, making it the correct answer.