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High Quality Content by WIKIPEDIA articles! In the War of Currents era (sometimes, War of the Currents or Battle of Currents ) in the late 1880s, George Westinghouse and Thomas Edison became adversaries due to Edison's promotion of direct current (De for electric power distribution over alternating current (Ae advocated by Westinghouse and Nikola Tesla. During the initial years of electricity distribution, Edison's direct current was the standard for the United States and Edison was not inclined to lose all his patent royalties. Direct current worked well with incandescent lamps that were the principal load of the day, and with motors. Direct current systems could be directly used with storage batteries, providing valuable load-leveling and backup power during interruptions of generator operation. Direct current generators could be easily paralleled, allowing economical operation by using smaller machines during periods of light load and improving reliability. At the introduction of Edison's system, no practical AC motor was available.

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