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What are car battery ratings?

Updated: 10/20/2022
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11y ago

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Auto batteries today, for the most part, are 12 Volt. They are rated according to cold cranking amps or what is commonly called CCA. CCA is the amount of current, measured in amps, that a battery can crank out for 30 seconds at 0°F. This rating is important as a battery has to work harder to start your engine in cold temperatures. The higher the CCA rating, the more power the battery can deliver. Be sure and purchased a battery with the highest possible CCA if you live in a cold climate. Never buy a battery with a CCA rating lower than the one that came on your vehicle.

Batteries are also rated in reserve capacity or RC. Reserve capacity is the length of time the battery can provide 25 Amps at 80°F. The reserve capacity is important if your alternator ever fails and you have to drive on the batteries reserve capacity.

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