Most batteries naturally lose their charge over time, particularly when they're not in use. For instance, if you have an old mobile phone tucked away in a drawer at home, it will likely be flat the next time you try to turn it on. The same applies to the battery in your vehicle.

Batteries are typically rated using CCA (Cold Cranking Amps), which measures how much current a fully charged battery can deliver for 30 seconds at a temperature of -18°C. Generally, the electrical system in your vehicle is designed to draw a fixed amount of current for each task it performs, so batteries with a higher CCA won't start your vehicle faster or improve its performance.

The CCA rating of a battery will gradually decrease over time, so batteries with higher CCA ratings may last longer.

However, other factors such as the quality of construction, the strength and
thickness of the internal lead plates, and the amount of electrolyte also play
a significant role in determining the battery's lifespan.

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