what does the rated capacity of a starter battery indicate?
The rated capacity of a starter battery indicates the amount of electrical energy that the battery can deliver over a certain period of time. This is expressed in ampere-hours (Ah) and is a measure of the battery’s ability to provide a sustained current flow.
In practical terms, the rated capacity of a starter battery determines how long the battery can provide power to start an engine or power other electrical components. A higher rated capacity means the battery can deliver more energy and therefore last longer before needing to be recharged.
However, it’s important to note that the rated capacity of a starter battery is not the same as its cranking power or ability to start an engine. Cranking power is measured in cold cranking amps (CCA) and is the maximum amount of current the battery can deliver for a short period of time, usually around 30 seconds, at a specified temperature.
While a high CCA rating is important for starting an engine, the rated capacity of the battery is more relevant for applications where the battery is used to power electrical components for an extended period of time, such as in marine or RV applications.
Overall, the rated capacity of a starter battery is an important specification to consider when selecting a battery for your application. It determines how long the battery can provide power before needing to be recharged and is an important factor in determining the overall performance and lifespan of the battery.
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