Cranking Battery vs Deep Cycle Marine Battery

As a boating enthusiast, you might not give two thoughts about your battery. As long as it's working, there is nothing to worry about. As a boater, you know the importance of a quality battery for a smooth sailing experience.

If you check your engine, there is one of two types of batteries that are in there: a cranking battery or a deep cycle battery. Both serve a distinct purpose for your boat and are each designed to handle different loads and usage patterns. Using the wrong one for your particular load could end up causing some issues for your boat down the line. That’s why it’s important to know which one is the best battery for your boat.

Cranking Batteries

A cranking battery, also known as a starting battery, is designed to start your marine vehicle’s engine. To do so, it delivers high bursts of power through a short duration of time to start the motor, like it’s “cranking” it.

It uses thinner plates to maximize the surface area which helps provide quick bursts. The more plate surface there is, the easier it is to provide the necessary power. Once the engine is on, the alternator takes over providing power to the electrical system on the boat.

Cranking batteries are ideal for applications requiring a high power output very quickly. In addition to starting boats, these batteries are also great for any applications that need a high power output very quickly. However, they are known to require regular maintenance to ensure longevity.

Deep Cycle Marine Batteries

Deep cycle marine batteries are designed to provide sustained power over a long period of time. These batteries are made to be constantly charged and discharged, which is why they’re made with thicker plates than cranking batteries.

The thicker plates on the deep cycle batteries allow them to be capable of deeper discharge cycles without damaging the battery itself. This allows it to power multiple electronics on top of the trolling motor of the boat engine.

On top of being able to run electronics and marine accessories while running the motor, the deep cycle battery doesn’t need as much maintenance as other batteries typically would. As such, they are a popular choice for many marine activities.

Key Differences

What Battery is Right for You?

Understanding the differences between a deep cycle marine battery and a cranking battery is crucial to understanding the right battery for the job. If you’re looking for a battery that is perfect for starting engines, a cranking battery is your best choice. Their ability to deliver high power quickly is perfect for starting engines.

However, if you’re looking for a battery that provides consistent power on your marine vehicle, a deep-cycle battery is the ideal choice. Whenever you require long-term, consistent energy output, a deep-cycle marine battery will almost always be the best choice for you.

Selecting the appropriate battery type depends on your specific needs in marine applications. Using the right battery for the right purpose ensures better performance and longevity, contributing to a more reliable and enjoyable marine experience.