A battery holds its terminal voltage constant. What kind of current does it establish once the circuit settles?

1. A battery is a constant voltage source, so the voltage it applies does not change with time. 2. With a fixed voltage across a fixed resistance, I = V / R gives a fixed current. 3. Charge therefore flows steadily in one direction, which is direct current. 4. Alternating current requires a source whose voltage varies periodically, which a battery does not. _Source: OpenStax College Physics (CC BY 4.0), Ch 20 "Electric Current, Resistance, and Ohm's Law", section Alternating Current_