Thomas Edison championed direct current (DC) power.
Edison developed direct current, where the current flows in one direction, similar to a battery. During the early years of electricity, DC was the standard in the United States. He built his power stations to deliver DC power, and believed it was superior for safety and efficiency reasons.
While other inventors and scientists contributed to the understanding and implementation of both DC and alternating current (AC), Edison was a prominent and vocal advocate for DC, leading to what became known as the "War of the Currents" with proponents of AC, such as Nikola Tesla and George Westinghouse.
