Even as the battery power deteriorates over time, they will be more likely to last longer and provide better service.Įven though you cannot calculate battery capacity, you can still determine the best battery for replacement. Higher capacity and power batteries will have better CCA values than weaker batteries. While knowing this starting power can help you choose a better battery, you will need to convert CCA to AH to determine capacity.ĬCA can be a good unit of measure to help you determine the best battery for you if you live in cold conditions. Many batteries use CCA to represent the battery’s ability to start an engine at certain temperatures, usually ranging between 30-32 degrees Fahrenheit. Calculate the runtime to full capacity: t 1/0.2 5 hours or 300 minutes. In that case, you need to work this formula around to find the Ah value. But you want to convert CCA to Ah, the opposite given in this formula. For 200 Ampere hours, the CCA rating will be 1450. To find it: Calculate the capacity of your battery: Q 12 V × 200 Ah 2,400 Wh. It means multiplying the Ah value with a constant 7.5 to get the equivalent CCA value. GEL Batteries -Differences What Are Cold Cranking Amps? 5 hours, assuming that you have a 12 V 200 Ah car battery and a charging rate is 0.2C. A single ampere represents a single coulomb of electrical charge, which passes throughout every part of the conducting item within a second. The ampere measures the flow of electrons and current within a conductor. Therefore, Ah (ampere-hours) represents the battery operation threshold, which can calculate how long the battery might last without recharging. What Are Ampere Hours (Ah)?īattery measurements are commonly written out in units of ampere-hours (Ah), and milliampere hours (mAh), which represent 1/1000 Ah. Conversely, if you have the Ah ratings on your battery, you can calculate the CCA measurement to determine how suitable your battery is for cranking your engine in cold temperatures. Understanding your rate of use and your voltage level will help you make the right battery choices, even if you only have the CCA figures. ![]() For instance, if your battery is marked with a 1450 CCA, it represents 200 Ah.Ī battery of this rating should last for 25 hours while producing power of 8 amps. But for a rule of thumb, you can divide the CCA by 7.25 to get the calculated Ah. There is no way to convert CCA to Ah directly because there is no correlation between them.
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