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GamingJalopnikabout 20 hours ago
Why Cars Switched From 6-Volt To 12-Volt BatteriesBefore the mid-1950s, cars used 6-volt batteries, but postwar engines with higher compression ratios and more electrical accessories overwhelmed them. General Motors introduced 12-volt systems in 1953, and by 1955 every U.S. automaker had switched. Twelve-volt batteries offer more cranking power, thinner wiring, and longer life.
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