Cold Cranking Amps (CCA) Value of Car Battery?

[KimberlyRose]

The so-called Cold Cranking Amps (CCA) value refers to: Under a specified low-temperature condition (usually set at 0℉ or –17.8℃), the amount of current a battery can continuously deliver for 30 seconds before the voltage drops to the limit discharge voltage. For example: If a 12-volt battery case is marked with a CCA value of 600, it means that at 0°, before the voltage drops to 7.2 volts, it can continuously provide 600 amperes (Ampere) of current for 30 seconds. This concept is introduced to emphasize the battery's discharge capability, thereby ensuring reliable and genuine energy supply for starter usage. We can see markings like "110Ah/450A" on many foreign starter experiment reports and drawings, which means: The starter can meet the engine cold start test requirements using a 110Ah battery with a CCA of 450A in a –17.8℃ environment. If we only pay attention to the battery capacity of 110Ah and ignore the cold start current capability, following the same specifications for the engine cold start test, our test is very likely to fail. The result might be requiring the starter manufacturer to replace it with a higher power level starter product or increasing the battery capacity to solve the cold start problem.