Best RV Deep Cycle Batteries – Top Picks Reviewed

| Last Updated: May 20, 2022

The battery of your RV is like its lifeline. So, as long as the battery is fine, everything else will be fine as well. However, if the battery dies on you, you will not be able to use any appliances in your RV, and you will basically have no electricity. That is one situation you do not want to find yourself in.

The best batteries to use in your recreational vehicle are deep cycle batteries. They will keep your RV going without a doubt. This review will focus on some of the best RV deep cycle batteries so that you can choose the perfect match for your vehicle. Let’s begin. 

Comparison of the Best RV Deep Cycle Batteries

  • Functions as a starting as well as a deep cycle battery
  • It has a reserve capacity of 120 minutes for constant performance
  • 12-volt battery with 750 cold-cranking amps and 870 cranking ampere
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  • Best AGM RV deep cycle battery
  • It is a 12-volt battery with 100 amp hour rating
  • Has an acid-proof plastic body
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  • Best for the money
  • It has a lifespan of up to 10 years
  • Warranty of this battery is 2 years
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  • Best 12 RV deep cycle battery
  • Designed especially for solar energy applications
  • Maintenance-free battery for high convenience
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  • Best 6V RV deep cycle battery
  • It has a float service life span of 8 to 10 years
  • Capable of storing energy from a solar application system
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What is a Deep Cycle Battery?

A deep cycle battery is definitely different from your regular battery. It is mainly made from lead and provides your vehicle with sustained power for extended time periods. It is much more reliable compared to a regular battery, as it can be recharged time and time again.

It runs without any issues until it at least is 80% discharged. After reaching that point, you will have to recharge it. One thing to keep in mind is that many manufacturers do not recommend discharging below 45% as it could reduce the life of the battery. 

How Does a Deep Cycle Battery Work?

Deep cycle batteries are constructed a little differently from other batteries. They use thick plates that allow the battery to discharge down to 80%. These batteries are made for charging and discharging multiple times. That is why they do not sustain any damage while other batteries do.

Optima D34M BlueTop

The one thing that really sets deep cycle batteries apart from your average battery is that they have solid lead plates and not sponge plates. Unlike starter batteries, deep cycle batteries do not provide short, high-current bursts and discharge a fairly small part of their capacity. Instead, they are more consistent.

How to Choose a Deep Cycle Battery

It is essential to know how to pick out a deep cycle battery for your vehicle. There are a few different types; however, we will touch upon that later. This section will just focus on the factors you need to consider before you choose a battery for yourself. 


These batteries are usually measured in group sizes. These group sizes are 24, 27, and 31. Typically, the bigger the battery is, the more AH and RC it has. The size of the battery can have an effect on the amp hours as well as other functional aspects of the battery. 

Life Expectancy

Life expectancy is another important aspect that you should check out before making your choice. It is important to know how long your battery will last you. After that, you can even take steps to stretch its life. Although the exact life expectancy depends on the type of battery you are using, a good deep cycle battery will last you at least six years on average.


The power of the battery is another integral factor that needs to be considered. Power for deep cycle batteries is measured in amp-hours or AH or by its reserve capacity, which is abbreviated as RC. You need to remember all the complications with these units. All you need to know is more is better.

Review of the Best RV Deep Cycle Batteries

So far, we have accumulated the basic information regarding deep cycle batteries. Now the time has come to start the review in earnest. The following are some of the best deep cycle batteries. Each one will be reviewed in detail to see what it is capable of. So buckle up and let’s get started. 

Best Overall:
Optima D34M BlueTop

Optima OPT8016-103 Batteries D34M BlueTop Starting and Deep Cycle Marine Battery


  • Cost-efficient as it is a dual-purpose battery
  • Able to start with ease even in cold, harsh weathers
  • Amazing reserve capacity and a very fast recharge time
  • Dual-purpose battery that can be used as a deep cycle and a starting battery 
  • Great design which allows portability as well as shock and vibration resistance


  • Housing could sustain damage if the battery is not handled with proper care

What Recent Buyers Report

The reviews of this battery detail how well it performs in general. Apart from that, it has been compared to other batteries and has been praised for how lightweight it is in comparison. It can be judged from the reviews that this is a high-quality battery that lives up to its claims. 

Why it Stands Out to Us

This battery has a lot of things that stand out. Firstly, it is a dual-purpose battery which immediately sets it apart. Apart from that, it is a powerful yet considerably lightweight battery that is portable. Performance-wise, it is good too as it can work in harsh weather conditions without any problems.

Who Will Use This Most 

The Optima D34M BlueTop is perfect for people who travel long distances and need that extra bit of power in their vehicle. It is also good for people who are often in harsher weather conditions. It’s also a great pick for especially those who are in areas with extremely cold temperatures. 

Bottom Line

Even though this battery is considered to be lightweight, it should not be taken lightly. It delivers a great performance and is reliable to travel with. Apart from that, it is shock and vibration proof, which just makes it better. 

Runner-up and Best AGM RV Deep Cycle Battery:
Universal Power Group AGM Battery

Universal Power Group 12V 100Ah Solar Wind AGM SLA DEEP Cycle VRLA Battery 12V 24V 48V


  • Battery can be mounted in many ways as it is flexible
  • Equipped with a valve that regulates the performance
  • Versatile battery can be used in many different situations
  • No chances of leaking or spilling as the battery is sealed properly


  • Battery is a bit heavy; therefore, it is difficult to move
  • Stainless steel hardware is a bit shorter than necessary

What Recent Buyers Report

This battery has been quite popular with buyers recently. The fact that it is so long-lasting is the primary reason so many buyers are satisfied with it. Apart from that, the overall quality of the battery has also been praised by many of the buyers.

Why it Stands Out to Us 

This 12-volt battery is one of the best by AGM. It is very versatile and can be utilized in a number of different ways. Since it is so flexible, it can be mounted in any way you want. In addition to that, it is very well made and is sealed to prevent any leakage and spilling.

Who Will Use This Most 

As mentioned previously, this battery is pretty versatile. It can come in handy in a number of different situations. For example, it can be used in homes, at job sites, and of course, in recreational vehicles. 

Bottom Line

If you are looking for a good 12 volt AGM battery, this one is a promising option. It provides you with a stellar performance that will not let you down. Plus, it is well made, so there should be no issues with it breaking or getting severely damaged with regular use. 

Best for the Money:
Odyssey PC680 Battery

ODYSSEY PC680 Battery, red top


  • Warranty includes full replacement if there is a need for it 
  • Suitable for extreme outdoor conditions including harsh weather
  • Build with high-quality materials that desist shocks and vibrations
  • Longer lifespan than many other batteries making it cost-efficient
  • Recharges very quickly, is capable of being fully charged in a matter of hours


  • May not hold a charge for as long as it competition
  • Technical support for this manufacturer is not up to the mark

What Recent Buyers Report

The overall performance of this battery has been found to be very good by many of the buyers. Some have even posted updates on their reviews detailing how long the battery has lasted them without causing any problems. The only complaint was that the customer service was not very good. Apart from that, users had no complaints.  

Why it Stands Out to Us

The value offered by this battery is something that caught our eye. It delivers an amazing performance at its price point. Apart from that, it is sturdy and reliable and will always be ready to use whenever as it can be charged quickly and with ease.

Who Will Use This Most 

Buyers looking for quality on a budget would find this battery very useful. It is the perfect combination of functionality and affordability. Apart from that, it also has enough cold cranking amps to be useful for those who often find themselves in harsh weather conditions.

Bottom Line

This unit by Odyssey is not a bad option to consider if you want a deep cycle battery that is affordable. Although it costs considerably less than a lot of deep cycle batteries, it manages to provide excellent performance, durability, and reliability. 

Best 12V RV Deep Cycle Battery:
Renogy Deep Cycle AGM Battery

Renogy Deep Cycle AGM Battery 12 Volt 100Ah, 3% Self-Discharge Rate, 2000A Max Discharge Current, Safe Charge Most Home Appliances for RV, Camping, Cabin, Marine and Off-Grid System, Maintenance-Free


  • Resists shocks and vibrations pretty well
  • Versatile unit that can be used for several purposes
  • Easy and convenient to use as it is totally maintenance-free
  • Made with high-quality materials that are sturdy and durable
  • Battery is completely sealed so that there is no chance of leakage or spillage


  • Difficult to transport as it is heavy and bulky

What Recent Buyers Report

According to reviews, this battery performs very well, especially when it is hooked up in a parallel connection. It is a high-quality battery with a high capacity. Plus, it can work for extended time periods. The only issue that buyers reported was its weight. However, they were willing to overlook that fact for the performance it provides. 

Why it Stands Out to Us 

This battery has many aspects that allow it to stand out. First, let’s talk about its capability of preventing over-discharge. Performance-wise, it also works very well. That said, it is convenient to use and easy to handle as well. 

Who Will Use This Most 

The Regony Deep Cycle AGM Battery is very versatile. It has a lot of different applications, which is why it appeals to a wider audience. Apart from being useful to power an RV, it can also be suitable for cabins, emergency lighting, and it can also be used for backup. 

Bottom Line

Overall, it is a really good deep cycle battery, and it can come in handy in many different situations. Yes, it is heavy and a bit bulky, but that is to be expected of a 12-volt deep cycle battery. Keeping in mind the customer reviews, it seems to be a great investment.

Best 6V RV Deep Cycle Battery:
Vmaxtanks Vmaxslr125

Vmaxtanks VMAXSLR125 AGM 12V 125Ah SLA Rechargeable Deep Cycle Battery for Use with Pv Solar Panels Smart chargers, Wind Turbines and Inverters and Backup Power (12 Volt 125Ah Group 31 AGM)


  • Made with military-grade custom plates
  • Low discharge rate allows it to work for a longer time period
  • Completely safe from any leakages and spilling due to its design 
  • No maintenance required to use it which makes it really convenient
  • One of the safest batteries available as it does not let out any dangerous fumes or gases


  • A little bit on the heavier side, therefore, is difficult to carry and transport

What Recent Buyers Report

This battery has received a lot of positive reviews. Buyers find it to be very useful as it can work for extended periods of time and does not need to be recharged frequently. Updated reviews also detail how the battery continues to provide excellent performance over time. 

Why it Stands Out to Us 

The consistency of this battery is what we appreciate most. It is able to function well over time and has enough power to sustain your recreational vehicle reliably. Apart from that, it is convenient to use, and it is a safe option as it does not produce any dangerous gases that could cause the people near it any harm. 

Who Will Use This Most 

This deep cycle battery is quite powerful and can be used in many different ways. However, given its specifications, it would be best for those who have to travel nonstop over long distances. The weight of this battery needs to be kept in mind. If your vehicle is capable of handling it, then it will prove to be very useful for you. 

Bottom Line

The Vmaxtanks Vmaxslr125 is a great deep cycle battery. It is well made with sturdy material, and you will not have to worry about maintenance with it. We agree that it does weigh a bit much; however, do not let that discourage you from taking advantage of this deep cycle battery!

Types of Deep Cycle Batteries

Earlier on in the article, we mentioned that there are different types of deep cycle batteries. In this section, we will talk about just that. There are a few different types, and in this section, we will find out how these types differ from each other. 

Flooded Batteries

These are by far the oldest rechargeable batteries that are still being used. Flooded lead-acid batteries are also known as wet cell batteries. Such batteries contain a liquid in a container that is unsealed. To use this battery, you must be careful to place it in an upright position and in an area that is well ventilated. This is so that the hydrogen gas produced by the batteries can be disposed of safely.  

Gel Batteries

A gel battery, or gel cell, is a sealed and valve-regulated lead-acid deep cycle battery. It has a gel electrolyte and doesn’t have to be placed upright like the flooded batteries. With this type of deep cycle battery, you do not have to worry about evaporation, spillage, or leakage. In fact, these batteries are more resistant to shock and do well in harsh weather conditions.

AGM Batteries

AGM is the abbreviated version of Absorbent Glass Mat. This kind of lead-acid battery absorbs the electrolyte into a fiberglass mat. AGM batteries can have two types of plates. They can be flat, and they can also be wound in a tight spiral. Furthermore, they can handle higher temperatures as they have lower resistance and, as a result, discharge more slowly. 


All in all, the article talks about different deep cycle batteries, each with their own special qualities as well as their ups and downs. However, each one comes with the features that matter the most, which are size, power, and life expectancy. After that, it is up to the buyer to decide which one of the batteries fit their criteria the best. Be sure to look for other features like sturdiness and durability as well. Deep cycle batteries can come in handy in many different situations. Hence it is not a bad idea to invest in one!

People Also Ask

This section is dedicated to frequently asked questions about deep cycle batteries. Let’s take a look at what these questions are as well as the answers to them. We hope this section will help you sort out any confusion you have about such batteries. 

How Long Do Deep Cycle RV Batteries Last?

The life expectancy for deep cycle batteries can differ depending on the type of the battery. However, on average, it will last you anywhere around six to ten years. 

Is it OK to Leave Your RV Plugged in All the Time?

If there is a need to leave it plugged in, then there is no harm in doing that. However, there is one thing you should be careful of, and that is monitoring your house batteries. Check the electrolyte levels and make sure they are not low, or the electrolyte has not completely dried out. 

Can You Overcharge Deep Cycle Battery?

Overcharging may not be the best decision for your battery, as it can cause a serious amount of damage. Overcharging as well as under-charging your battery can cause its life expectancy to be shortened drastically. 

How Often Should You Charge a Deep Cycle Battery?

Charging is very important for deep cycle batteries, as inactivity can prove to be very dangerous for them. If you are not using your battery frequently, be sure to give it a boost charge so it can maintain a good condition. Deep cycle batteries should be charged more often in warmer climates; once a month would do. For colder climates, it needs to be charged every 2-3 months. 

How Long Should You Charge a Deep Cycle Battery?

Deep cycle batteries can have a longer charge time as that aids a deeper discharge. On average, it can take 10-12 hours. However, the charging time will depend on the size of your battery as well as your charger. One thing to be careful about while charging the batteries is the temperature. If it gets too hot, your battery could be damaged.

Should You Trickle Charge a Deep Cycle Battery?

Trickle charge is not recommended for deep cycle batteries at all. It could end up severely damaging it. There is a chance that your battery could end up completely destroyed. 

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My husband and I live a life on the road so we figured no better way to share our journey than through a blog! While traveling place to place as RV noobies, we quickly realized how often we were in need of RV accessories and supplies. This led us to launch RV Expertise and sharing our top picks.