Deep cycle vs starting vs dual purpose batteries, what is the difference? You might have heard of the terms “starting battery,” “deep cycle battery,” and “dual purpose battery” at some point if you have been shopping for a new battery. But what do these terms actually mean? All these are types of lead-acid batteries, which are commonly used in cars and boats. While they might look similar on the outside, there are some key differences between these three battery types. Read on to find out more about the key differences between them and their applications.
A starting battery is designed to deliver high current for a very short period, typically known as burst-discharge or cranking power. They release large amounts of energy very quickly and are often used in applications such as starting car engines. No car or any engine with an electric starter would be able to operate without a starting battery. The common starting battery available is the lead-acid battery, which has been used in cars for over a century.
Features:
- High currents for a very short time.
- Quick release of energy.
- Available in three types: lead-acid batteries, enhanced flooded batteries (EFB), and AGM batteries.
Dual-Purpose Batteries
As the name suggests, a dual-purpose battery is better to be used for multiple functions, in this case, cranking power and low-amp draw (cycling). These batteries are typically used in applications where a consistent power source is needed, such as marine applications.
A good example is when used to power a trolling motor. In this instance, the dual-purpose battery provides enough ability to start the engine and keep the trolling motor running steadily. In cars, the dual-purpose battery is used to give both starting and auxiliary power, enough to run the onboard accessories.
Some dual-purpose batteries charge fast and provide an 80% depth of discharge, which is pretty good.
Features:
- Excellent starting capability.
- Low self-discharge rate.
- They are versatile, made for both deep cycle and starting applications.
- Excellent cold weather performance.
- They are durable, they are made to withstand the harsh marine conditions.
- Available in both flooded and sealed (AGM) battery types.
Deep Cycle Batteries
Features:
- Regularly discharged and recharged without causing damage.
- Can be used for a variety of applications.
- Available in a variety of sizes and shapes.
- Low maintenance and long lifespan.
- Resistant to vibration and shock.
- Available in both lead acid (AGM, gel, and flooded cell) and lithium battery technologies.
Summary: Deep Cycle vs Starting vs Dual Purpose Batteries
These three types of batteries all have their specific applications. Starting batteries are designed to provide high current for a very short period, making them perfect for starting car engines. They are easy to damage if not used properly, so they are not suited to applications where a consistent power source is needed.
Dual-purpose batteries are better suited for applications where both starting power and a consistent power source are needed, such as in marine applications. Deep cycle batteries are ideal for powering numerous electronics or other applications that place high demands on the battery.
Dual-purpose batteries offer a good mix of features from both types of batteries. This shows that there is a battery type available for every application. That’s why it’s important to choose the right one for your needs.
FAQs
Can a deep cycle battery be used as a starting battery?
Can I charge a deep cycle battery with a regular charger?
Are dual-purpose batteries any good?
Dual-purpose batteries offer multiple features from both starting and deep cycle batteries.
How do I know if my battery is deep cycle?
Read the manual or product description to see if the battery is designed for deep cycling. If the information isn’t available, check the sticker on the battery for the deep-cycle label.
What happens if you overcharge a deep cycle battery?
Overcharging a deep-cycle battery will damage the battery and shorten its lifespan.
How long can a deep cycle battery last without charging?
A deep cycle battery will last longer than a starting battery, but its lifespan will still be reduced if it regularly goes without charging.
Final Thoughts: Deep Cycle vs Starting vs Dual Purpose Batteries
While all three types of batteries have specific applications, a battery type is available for every need. Choosing the right one for your application is important to ensure optimal performance.
James is an engineer and a professional blogger. He has gained extensive experience over the years, handling all types of power projects. He loves to share his experiences with all things related to batteries, generators, and other power-related topics.
