Deep Cycle Battery Guide In 2022 (Types & Usage)

A deep cycle battery is a lead-acid battery designed for charges and deep discharges. Unlike other lead-acid batteries, deep cycle batteries can be discharged up to 80% without damaging the battery.

Deep cycle batteries are often used in applications where long run times are required, such as marine, RVs, and solar energy systems. Deep cycle batteries’ longer life and higher discharge rate make them attractive for many applications despite being more expensive than other lead-acid batteries.

What Is A Deep Cycle Battery?

Many consumers are not familiar with deep cycle batteries and their benefits. Lead-acid deep cycle batteries are designed to be periodically discharged and recharged for extended periods.

Unlike starter batteries, deep cycle batteries are not intended to provide a large burst of current for a short time but instead deliver a smaller amount of current over an extended period. Deep cycle batteries are often used in applications where a long-term power source is needed, such as marine vessels, RVs, and solar energy systems.

Solar panels on the roof of home.

Deep cycle batteries typically have thicker plates than starter batteries, which helps to protect them from the stress of repeated discharge and recharge cycles. In addition, deep cycle batteries are often filled with gel or absorbent glass mat (AGM) electrolytes instead of conventional liquid electrolytes. This further protects the battery from damage.

What Is The Difference Between A Deep-Cycle Battery And A Standard One?

There are two main types of batteries: Deep Cycle and Regular.

In contrast to standard batteries designed for occasional use, deep cycle batteries are recharged and discharged regularly. Deep cycle batteries have thicker plates and longer-lasting active material to periodically withstand discharged and recharged without damaging the battery. This makes deep cycle batteries ideal for applications like powering trolling motors and golf carts, where the battery will be regularly discharged and then recharged.

In contrast, regular batteries are not designed to be periodically discharged and charged again. So they will not last as long in applications where they are regularly cycled. Standard batteries are typically used in only occasionally discharged applications, such as starting a car engine.

What Are Deep Cycle Batteries Good For?

Deep cycle batteries are suitable for various applications where a long-term power source is needed. Some typical applications include:

Marine vessels

Deep cycle batteries are often used in marine vessels as a backup power source in case of an emergency. They can also power navigational equipment or other boats’ electronics.


Many RVs come equipped with deep cycle batteries that can be used to power the RV’s electrical system. This can include things like the fridge, lights, and air conditioning.

Electrician inspecting the air-con parts.

Solar energy systems

Solar energy systems often rely on deep cycle batteries to store energy collected from the sun. Home appliances and devices can then be powered with this energy.


Many electric wheelchairs use deep cycle batteries as their power source. This allows the wheelchair to be used for long periods without recharging.

Deep cycle batteries are often used in applications where a steady supply of power is needed over a long time. This could include powering electric vehicles, golf carts, or boats. Deep cycle batteries are sometimes used as backup power sources for homes or businesses.

As a result, batteries assist in providing power during outages or reducing the strain on the power grid during peak demand periods. While deep cycle batteries have many benefits, they also have some drawbacks.

They tend to be more expensive than other batteries, requiring more maintenance. Deep cycle batteries also have a shorter lifespan than most other batteries. However, deep cycle batteries can be an excellent choice for applications where a reliable and long-lasting power source is needed.

How Long Do Deep Cycle Batteries Last?

Deep cycle batteries typically have a lifespan of 2-5 years. However, they can last for up to 10 years if used frequently and adequately maintained. However, suppose a deep cycle battery is regularly discharged and recharged to more than 80% of its capacity. In that case, it would significantly reduce the life of the battery.

It is essential to only use a deep cycle battery in applications where it will be regularly discharged and recharged. Additionally, deep cycle batteries should be stored appropriately and maintained to extend their lifespan.

How Do I Store A Deep Cycle Battery?

Batteries with a deep cycle are designed to be discharged and recharged repeatedly to operate optimally. They are often used in marine and RV applications where extended periods of use are standard. If you have a deep cycle battery, it is crucial to store it properly when it is not in use:

  • Make sure the battery is fully charged. This will help to prevent sulfation, which can damage the battery.
  • Clean the terminals and connections with a brush or cloth. This will help to prevent corrosion.
  • The battery must be kept in a dry, cool place.

Expert Tip: Extreme temperatures can damage the battery, so it is best to avoid storing it in direct sunlight or in a hot attic. You can prolong the life of your deep cycle battery by following these simple steps.

How Does Temperature Affect My Batteries?

Solar energy and other renewable energy applications benefit from deep cycle batteries, which can be discharged and recharged many times. However, the temperature can significantly impact the performance of deep cycle batteries.

In general, higher temperatures tend to shorten the lifespan of batteries. In comparison, lower temperatures can reduce the capacity and efficiency of batteries. Because of this, when choosing a deep cycle battery for a particular application, it is essential to take temperature into account. For example, suppose you live in an area with hot summers. In that case, you may need to choose a battery with a higher temperature rating.

Conversely, suppose you live in an area with cold winters. In that case, you may need to choose a battery with a lower temperature rating. By understanding how temperature affects deep cycle batteries, you can select the correct battery for your particular application.

How Often Should I Charge My Deep Cycle Battery?

Deep cycle batteries should be charged as soon as possible after being discharged. This helps prevent the formation of sulfate crystals on the plates, reducing the battery’s capacity. Additionally, deep cycle batteries should be regularly equalized, slowly charging the battery at a higher voltage to help remove any sulfate crystals that have formed.

The chemical reaction of old leaking batteries.

What Can I Do To Make My Deep Cycle Battery Last Longer?

Your deep cycle battery can be extended by doing the following things:

  • Avoid deep discharges – Deep discharges stress the battery and reduce its lifespan. Try to keep your discharge cycles to no more than 50% of the battery’s capacity.
  • Keep the battery cool – Heat speeds up the chemical reaction inside the battery, leading to premature failure. Store your deep cycle battery in a cool, dry place from direct sunlight.
  • Equalize the battery regularly – Equalizing helps remove sulfate crystals from the battery plates, reducing the battery’s capacity. Most deep cycle batteries should be equalized at least once a month.
  • Avoid overcharging – Overcharging the battery can damage the cells and shorten the battery’s lifespan. Make sure to properly charge your deep cycle battery according to the manufacturer’s instructions.
  • Inspect the battery regularly – Check your deep cycle battery for signs of damage or leaks. If you notice any problems, take the battery to a professional for service.

Your deep cycle battery can last for many years with proper care and maintenance. Taking these measures will help ensure your battery performs well on a long-term basis.

What Are The Benefits Of Deep Cycle Batteries?

Deep cycle batteries are often used in various applications when it comes to batteries. Some of the benefits of using deep cycle batteries include the following:

  1. They are designed to be discharged and recharged multiple times without damaging the battery.
  2. They have a slower self-discharge rate than other batteries, meaning they can hold a charge for more extended periods.
  3. They can provide a steadier power output than other batteries, making them ideal for use in devices that require consistent power.
  4. They are less likely to leak than other batteries, making them safer to use and store.

Overall, deep cycle batteries offer several advantages over other types of batteries.

How Do I Choose The Correct Deep Cycle Battery For My Application?

When choosing a deep cycle battery, there are a few things you need to take into account


First, you need to determine the voltage you need. Voltage is the burning question when it comes to deep cycle batteries. There are many types with varying voltage requirements, so make sure you know your application needs before purchasing!

What is the voltage range for deep cycle batteries? The voltage of a deep cycle battery is an essential factor to consider. The most common voltages for deep cycle batteries are 6-volt, 12-volt, and 24-volt. However, there are also 8- volt and 10-volt batteries available.

Battery Capacity

Second, you should consider the battery capacity. This is measured in amp-hours (Ah), indicating how much power the batteries can store before recharging again. What is the average battery capacity?

The deep cycle battery capacity is typically measured in amp-hours (Ah). The average battery capacity ranges from 20 to 200 Ah. Of course, there are batteries with capacities outside of this range, but they are less common.

Type of Battery

Third, you’ll need to determine what type of battery you want. The higher an Ah rating means that your device will be able to last longer without having any interruptions from charging sessions!

Size and Weight

Finally, you need to decide on the size and weight of the battery. This will depend on where you plan to use it and how easy it can transport. Most people are looking for a battery that can last them throughout the day. The best way to find out what size and weight will work well with your needs is by testing different options!

What are the different sizes and weights? There are various weights and dimensions when it comes to deep cycle batteries. The most common size is 4D, which weighs about 30 pounds. There are also 6V and 12V battery options available. The weight of the battery will vary depending on the size and type of battery you choose.

You may want something small enough to fit into tight spaces. Furthermore, you may wish to have something heavy-duty because we know life comes at us fast. Sometimes without warning or respect, even though our values are taught otherwise.

Comparing products from different manufacturers is essential when searching for a deep cycle battery that meets your needs. You should carefully review the product description before choosing a battery so that it meets the specifications of your application.

Can A Car Alternator Charge A Deep Cycle Battery?

Close-up photo of a car alternator inside an engine.

You can charge a deep cycle battery with a car alternator. However, it could damage the battery and/or shorten its lifespan.

How Deep Cycle Batteries Should Be Charged

Deep cycle batteries work very differently from normal car batteries. If done properly, they are charged progressively: fast first, and gradually slower as it gets charged. They are usually charged with a specialized charger that controls the process.

Risks of Charging a Deep Cycle Battery with a Car Alternator

A standard alternator doesn’t control its output like this. It will charge the battery, but doing so this way is unhealthy for the battery. Moreover, you run the risk of overcharging it if you drive for too long and don’t drain the battery. This constant overcharge will also damage the battery.

How to Minimize the Risks of Charging a Deep Cycle Battery with a Car Alternator

You can balance the charge and discharge cycle of the battery. Don’t charge it for too long without draining it. You can use a switch in order to turn off the charging process when it’s already at full charge. This way you can avoid overcharging.

Can You Jump Start Off A Deep Cycle Battery?

You can jump-start off an appropriate deep-cycle battery.

Not all of them are appropriate, though. Deep-cycle batteries are designed to provide energy through long periods of time and withstand many charge/discharge cycles, as opposed to starting batteries, which are designed to provide a short burst of high power and are not designed to be drained fully.

Those deep-cycle batteries that are also designed for starting are usually referred to as “dual-purpose.” Your deep-cycle battery must have enough voltage and current output in order for this to work.

The Risks

There are also some risks to jump-starting with a deep-cycle battery, as an impropriate one could damage the electronics in your car. This is especially true for more modern vehicles that have more complex and delicate electronics. It could also shorten the deep-cycle battery’s lifespan.

For these reasons, it is not recommended to jump-start a deep-cycle battery on a regular basis. You should try to avoid it, but if you’re in a rush or in an emergency situation, it’ll work in a pinch.

How Many Years Should A Deep Cycle Battery Last?

Six years. Depending on the frequency of use, deep cycle batteries can last up to six years (depending on care and charging). Your responsibility is to ensure that they get the correct charging cycles to achieve this lifespan. They will only last a fraction of that amount if they are not used accurately!


Deep cycle batteries are the best type of battery to use in your boat, car or any other device that requires a steady power supply. They have slower self-discharge rates which means they can hold their charge longer and provide more consistent output than different types do!

The pros of deep cycling include not having issues holding onto extra energy when you don’t need it anymore. As well as providing an even distribution throughout its lifespan. It has due diligence on maintaining good health, so there will be no significant drops offs at specific times like others might experience.

Choosing a deep-cycle battery is not an easy task. It can be challenging to do when so many different manufacturers are out in the market. Make sure you read descriptions carefully to tell if your chosen product works well or has compatibility issues with other equipment that might already exist on-site!

If you have any questions, leave a comment below!

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About Matthew Webb

Hi, I am Matthew! I am a dedicated car nerd! During the day, I am a journalist, at night I enjoy working on my 2 project cars. I have been a car nerd all my life, and am excited to share my knowledge with you!

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