There are several standards for measuring CCA, but the one below is the most common.Ī battery’s CCA rating describes how much current, measured in Amp (A), a fully charged battery can deliver for 30 seconds with the battery voltage not dropping below 7.2V at 0☏ (-18☌). That is why the CCA rating is just as important, if not more, than the Ah rating.Ī higher CCA battery can provide a stronger current which helps start larger or cold engines. The starter draws a lot of power from the battery over only a few seconds. When the engine runs, the ATV gets most of its power from the vehicle’s charging system the battery only works as a buffer when you use more power than the built-in charging system can provide.īut when you start the ATV, all the electricity required to run the electric starter comes from the battery. Where the Ah-rating tells you how much current the battery can provide over a long period, the Cold Cranking Amps (CCA) describe its ability to deliver a burst of power over a short time (usually 30 seconds). Because Ah varies with temperature, the test is done at 68 ☏ (20 ☌) for comparable results.įor example, a battery with an 18.9 Ah (20HR) rating can continuously deliver 18.9A/20hr = 0.945A for 20 hours. The battery Ah-rating is calculated by what current the battery can deliver constantly over a specified period (usually 20 hours), multiplied by that period. Think of it as the battery’s endurance rating. Battery Capacity (Ah)Ī battery’s capacity is how much electric charge it can deliver at its rated voltage and is typically measured in Amp Hours (Ah). If the battery bounces around in the battery compartment, it is prone to cracking, and other damages, and the connectors may come loose, potentially causing potentially dangerous short circuits.Ī battery that is too big may physically not fit on the ATV, depending on the design of the mounting spot. ![]() The clamping mechanism may not keep the battery securely in place if the battery is too small. That is why ATVs with larger engines and many accessories typically use larger batteries than smaller engine base models.Ĭhoosing the right size battery is essential to ensure a good fit in the vehicle’s battery compartment. Physical DimensionsĪ battery’s physical size is measured as the Length x Width x Height of the battery casing, not including the battery terminals.ĪTV- and Powersports batteries come in a wide range of sizes designed for various applications and engine sizes.īigger engines typically need a battery with more starting power to start, and vehicles with power-hungry accessories like an electric winch need a battery with sufficient capacity not to run out of power too soon.Ī battery’s physical size closely relates to its starting power and capacity. Related: Is Your ATV Battery Bad? 9 Symptoms to Look For How Are ATV Batteries Sized?ĪTV batteries are sized by physical dimensions (L x W x H), starting power (CCA), and battery capacity, measured in amp hours (AH). ![]() This guide covers everything you need to know about ATV battery sizing and how to know what size and capacity battery your ATV needs. Using the wrong size or capacity is asking for trouble. ![]() Selecting the correct battery for your ATV is essential for proper fitment, performance, and safe operation.
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