![]() Due to this differing functionality, car batteries cannot be used for boats.Your car’s starter battery is probably one of two rechargeable battery types - it’s either a flooded lead acid or an AGM battery. Marine batteries, on the other hand, are designed to supply continuous power to boats. Car batteries are designed to provide vehicles with large bursts of power when starting the car. ConclusionĪlthough cars and boats both utilize lead-acid batteries, their batteries cannot be used interchangeably. This is another core difference between the lead-acid batteries used in cars and boats. However, marine batteries are tested at the freezing point, as boats rarely go out on icy waters. This is because cars can be used when temperatures are below freezing. With cold-cranking amps, car batteries are tested below the freezing point. Lead-acid batteries used in boats, on the other hand, feature a Marine Cranking Amps (MCA) rating. See also A Fibreglass Boat Can Get Waterlogged (How to Avoid Damage)Īs we explained, car batteries will indicate cold-cranking amps (CCA), which measure how much power the battery can provide when starting a vehicle in moderate climates. By using the correct battery in a boat, owners can ensure optimal performance. Specialized marine batteries are used to support all the components of marine boats and their engines. If marine batteries weren’t designed this way, rough waters would result in the battery short-circuiting. The sturdier structure of boat batteries allows them to skillfully handle vibrations caused by bumpy marine travel. This also explains why marine batteries are far more robust than those used in cars. Of course, this speaks to the increased dependence on the batteries used in boats. For boats with GPS navigation systems, navigation lights, and other extra features, it’s often recommended that boat owners opt for full deep cycle batteries. This is because your boat’s pumps, gauges, sound system, and lighting are powered by this battery.Īs we mentioned earlier, marine batteries are considered a cross between starter batteries found in cars and deep cycle batteries. While car batteries release large currents in short bursts, the lead-acid batteries used in boats are designed to release smaller currents for extended periods of time. While marine batteries do supply an initial burst, they’re designed to provide a continuous energy supply to your boat’s engine. Unlike lead-acid batteries used in cars, those used in boats do not need to provide such a large initial current. This section will explain the differing functionality of lead-acid batteries used in cars and boats. In order to understand why car batteries are incompatible with boats, you need to know what car and boat batteries are used for. Understanding Why Car Batteries Are Incompatible With Boats Ultimately, the differing design, size, and functionality of the car and marine batteries are why they cannot be used interchangeably. This is reflected in the starting process of marine batteries, which is higher than that of car batteries. In terms of their design and functionality, marine batteries are a cross between automobile batteries and deep cycle batteries.Įssentially, marine batteries feature a more complex design to the nature of marine travel. The lead-acid batteries used by boats, on the other hand, are known as marine batteries. The lead-acid batteries used in cars are referred to as car or starter batteries. ![]()
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