7 Best Deep Cycle Battery Charger in 2021 Reviews & Buying Guide


We all know that batteries are one of the most essential components of an automobile. But, there are special types of batteries called deep cycle batteries that are specifically designed for heavy vehicles such as RVs, boats, and camper vehicles.

These batteries provide a controlled flow of power so that it remains active for a significantly longer period of time. To charge these batteries, you will need a special type of battery charger called a deep cycle battery charger. Here are some things to keep in mind while purchasing a deep cycle battery charger:

  • Battery Monitoring: An ideal deep cycle battery charger should be capable of monitoring the state of your battery while charging it. This way, you can keep a close eye on various parameters of your battery and make sure it’s in a perfect state.
  • Equalizing: The equalizing feature of the deep cycle battery charger allows it to balance your batteries’ charge and make sure it provides sufficient power output for a long time. It also reverses the sulfation effect on batteries.
  • Battery Capacity: To charge a large capacity battery, you will need a similarly large deep cycle battery charger so that you can provide a sufficient amount of input to the battery. As the capacity of the charger increases, the required charging time decreases.

We are presenting the best deep cycle battery chargers today that will be a great addition to your RV. These deep cycle battery chargers are carefully shortlisted based on various essential factors such as charging time, discharge cycle, functionality, and so on. You can get to know some of these factors on our “Buying Guide” for the best deep cycle chargers later in this article.

7 Best Deep Cycle Battery Charger in 2021

Best Deep Cycle Battery Charger in 2021: Reviews

1. NOCO Genius 12V Fully Automatic Battery Charger

NOCO Genius 12V Fully Automatic Battery Charger

Noco is a premium brand present on our list today. If you’re looking for any battery related accessories, you should consider an option from Noco.

The NOCO Genius GEN5X2 is our 1st pick today for the best deep cycle chargers and rightfully so as it is a smart battery charger. It features dual bank operation with 10 amps and 5 amps rating on each bank respectively. It is perfect for 12-volt batteries used on many different heavy vehicles. You can also simultaneously charge multiple batteries at once and control the operation with dedicated charging modes. There are integrated thermal sensors present on the device that can erect the temperature of the battery and prevent overcharging.

The best feature of the NOCO Genius GEN5X2 is its capability to charge even extremely discharged batteries that might even have 1-volt charge left. You can either use the smart charger mode, or you can switch to the manual mode for more precise and controlled performance. The NOCO Genius GEN5X2 requires a very simplified mounting procedure that lets the user install it quickly and easily in their vehicles. Noco is providing a 3 year long warranty period on this battery.

Best Features

  • Supports 12-volt batteries
  • 10 amps maximum supported output
  • 3 years warranty
  • Most premium deep cycle battery charger
  • 10 amps and 5 amps banks
  • Integrated thermal sensors

Pros

  • It prevents overcharging as well as undercharging
  • Can be used for multiple batteries at once
  • Multiple banks present

Cons

  • Very expensive compared to other deep cycle battery chargers

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2. TowerTop 12V Fully Automatic Battery Charger

TowerTop 12V Smart Battery Charger

TowerTop is a very popular brand which is known for its smart and innovative products. As TowerTop mostly deals with electronics equipment, you should check out its deep cycle battery charger.

In the 2nd position, we have yet another smart deep cycle battery charger present on our list coming from a brand called TowerTop. The 2/10/25A 12V Smart Battery Charger from TowerTop is capable of charging nearly all types of 12 volts lead-acid batteries from all major brands. It includes an automated 7 step charging program that is automatically carried out by the device. This introduces a safer and more optimized way to charge your car battery with this charger.

If you are facing a cold battery, you can use the advanced start aid feature of this charger to jump-start your battery within 2 minutes. The TowerTop 2/10/25A 12V Smart Battery Charger can also detect the remaining voltage on your battery so that you can get an idea about the current status of your battery and its charging performance. To make the monitoring even easier, there is a compact LED display present on the front where you can find all of the necessary information.

Best Features

  • Supports 12-volt batteries
  • 25 amps maximum supported output
  • Automated 7 step charging program
  • Advanced start aid
  • Voltage monitoring
  • LCD display

Pros

  • Suitable to jump-start cold battery
  • Multiple safety features are enabled
  • The maximum amperage rating is high

Cons

  • Cannot charge dead and extremely discharged batteries

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3. BMK 12V Fully Automatic Battery Charger

BMK 12V Smart Battery Charger

Smart products are not generally available at a cheaper price tag. But, BMK BLUEMICKEY is one of the few brands that offer a smart deep cycle battery charger at a very cheap price tag.

Coming in the 3rd place, we have the BMK 12V 5A Smart Battery Charger which is a combination of a battery charger as well as a maintenance device for your battery. It features a built-in battery diagnostic system that allows you to get all of the necessary information of your battery and take the necessary steps to keep it maintained. It is capable of charging 15 to 100 Ah batteries without any problem. There is a special 72 hours safety feature present on the battery charger that prevents overcharging of the battery in long charging sessions.

The BMK 12V 5A Smart Battery Charger is designed with a high quality ABS body that provides a decent build quality to the device. As for the inside, there are many protective circuits available such as short circuit and overload protection that maintain a reliable operation of the charger. The charging is carried with a 4 step charging program which is completely automatic as this a smart charge. You will also find an LED indicator on the charger that will allow you to monitor the charging status of your battery.

Best Features

  • Supports 12-volt batteries
  • 5 amps maximum supported output
  • Battery charger as well as battery maintenance apparatus
  • Supports 15 to 100 Ah batteries
  • 72 hours safety feature
  • High quality ABS body

Pros

  • All necessary safety measures are included
  • Automated 4 step charging program
  • One of the smart deep cycle battery chargers

Cons

  • It does not have a warranty period

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4. Mroinge 6V/12V  Fully Automatic Battery Charger

Mroinge 6V/12V  Fully Automatic Battery Charger

Mroinge is the cheapest brand available on our list today. Still, it is quite famous compared to many other options for its highly reliable deep cycle battery charger.

If you want a single deep cycle battery charger for all of your vehicles, the Mroinge Fully Automatic Trickle Battery Charger will be a great choice for you. It can be easily connected to a car or a motorbike due to its compact size and shape. Also, it supports 6 volts as well as 12 volts batteries which makes it a versatile option. You will find a 12 feet long DC cord included with the charger itself for further ease in connectivity. It also has the 4 steps automated charging program that allows optimized results.

The Mroinge Automatic Trickle Battery Charger is completely spark-proof even when you are connecting it with a lead-acid battery. Apart from that, it features many safety features such as reverse polarity protection, overheating protection, and overcharging protection. If your battery has already degraded a lot, you will be notified by the charger which should remind you to get the battery replaced as soon as possible. The Mroinge Fully Automatic Trickle Battery Charger has a 2 year long warranty period.

Best Features

  • Supports 6 and 12-volt batteries
  • 1 amps maximum supported output
  • 2 years warranty
  • 12 feet long DC cord
  • 4 step automated charging
  • Bad battery detection

Pros

  • Very affordable deep cycle battery charger
  • Comes with a warranty period
  • Built-in dual color LED indicator

Cons

  • Charging speed is very low

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5. Maintainer 6V/12V Fully Automatic Battery Charger

Maintainer 6V/12V Fully Automatic Battery Charger

Jane Choi is not as much of a recognizable brand present on our list as a couple of other choices. But, they are featuring a decent compact yet powerful deep cycle battery charger which you should take a look at.

Coming next, we have one of the most portable deep cycle battery chargers present on our list today. The Jane Choi Smart Battery Charger is also a battery maintainer as well as a smart choice for your battery. It charges the battery with a 10 step fully automatic charging enabled by the built-in MCU controller. This system monitors the entire charging procedure and stops the device when the battery is fully charged. It is capable of charging most of the 6 and 12 volts lead acid batteries present on the market right now.

There is a very compact yet highly informative LCD display present on the smart battery charger that can be used for visual monitoring of the device. The device will tell you the existing charger, remaining charging time, and charging status of the battery. There are multiple protection layers embedded on the Jane Choi Smart Battery Charger such as reverse polarity protection, overload protection, and IP65 water and dust resistance.

Best Features

  • Supports 6 and 12-volt batteries
  • 4 amps maximum supported output
  • Very compact deep cycle battery charger
  • 10 step fully automatic charging
  • Compact LCD display
  • IP65 water and dust resistance

Pros

  • Safe to use outdoors in all seasons
  • Suitable for a range of different vehicle batteries
  • Smart deep cycle battery charger

Cons

  • Comparatively slower charging speed

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6. Schumacher  6V/12V Fully Automatic Battery Charger

Schumacher SP1296 6V/12V Fully Automatic Battery Charger

If you frequently purchase automobile maintenance accessories and tools, you must have heard about Schumacher before. It is a highly popular brand for battery-related devices such as a battery charger and maintainer.

Up next, we have yet another highly compact device that will take complete care of your battery without any problem. The Schumacher SP1296 is a fully automatic battery charger as well as a battery maintainer that charges the battery at 2 amp current output. The automated charging performance on this deep cycle battery charger is controlled by a dedicated microprocessor that allows a multi-stage charging procedure and extended battery life.

Schumacher SP1296 has a built-in float mode monitoring enabled that is essential for optimum charging performance and keeps the battery healthy for an extended period of time. The safety features present on this charger are automatic voltage detection and reverse connectivity protection which is essential to keep the battery safe in long charging sessions. The Schumacher SP1296 is compatible with all AGM and deep cycle batteries.

Best Features

  • Supports 6 and 12-volt batteries
  • 2 amps maximum supported output
  • Fully automatic battery charger and maintainer
  • Controlled by a dedicated microprocessor
  • Float mode monitoring
  • Automatic voltage detection and reverse connectivity protection

Pros

  • A safer option for your battery
  • Comes with many battery maintenance features
  • Supports multiple types of batteries

Cons

  • Expensive deep cycle battery charger for its specifications

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7. ADPOW 12V Fully Automatic Battery Charger

ADPOW 12V Fully Automatic Battery Charger

Adpow is yet another brand from our list today which is dedicated to car batteries and other related accessories. If you have not found the ideal choice for your battery yet, check out the following option.

Our last pick for the best deep cycle battery charger is coming from a well-known brand called Adpow. The ADPOW Automatic Smart Battery Charger will be a great addition to your accessories kit as it is a smart charger as well as a battery maintainer. It is suitable for even completely drained 12-volt batteries because of its 7 steps automatic charging performance. There is an LED indicator present on the device that will give you visual feedback on the device.

It is suitable for a range of 12-volt batteries such as SLA, AGM, VRLA, maintenance-free lead-acid batteries, and much more. Thus, it is a suitable pick for different types of battery-operated devices including lawnmowers, electric vehicles, and RVs. The ADPOW 5A 12V Automatic Smart Battery Charger takes safety very seriously as there are many different safety measures present on the device. There is short circuit protection, overload protection, overcurrent protection, and many other preventive measures available to keep the battery safe. Adpow is promising a lifetime quality warranty on the smart deep cycle battery charger.

Best Features

  • Supports 12-volt batteries
  • 5 amps maximum supported output
  • Lifetime quality warranty
  • SLA, AGM, VRLA, and lead-acid batteries supported
  • Overcurrent, overloading, and short circuit protection
  • Can be used with many different batteries

Pros

  • Versatile option for multiple applications
  • Safe to use
  • Comes with a lifetime quality warranty

Cons

  • The amperage rating should have been higher

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Buying Guide For The Best Deep Cycle Battery Charger

Switching to a deep cycle battery is generally a great choice if you are planning long-distance travelling on your RV. But, to maintain a deep cycle battery, you will also require a decent deep cycle battery charger by your side. The regular battery chargers are not suitable for charging a deep cycle battery as the requirements of a deep cycle battery are quite different from a regular battery.

Therefore, we are presenting this buying guide for the best deep cycle battery chargers so that you can choose the correct battery charger for your deep cycle battery. Here, we will discuss some major specifications and differences in various deep cycle battery chargers and understand their effect on regular usage. By referring to our buying guide, you will be able to purchase the best deep cycle battery charger available in the market right now for your budget.

Battery Type and Specifications

While looking for a deep cycle battery charger, you must understand your battery first. For that, you will have to acknowledge various specifications and factor in the capacity of your battery so that you can buy the perfect deep cycle battery charger for your battery.

The battery type differs according to the machine it’s powering. For example, the battery used for a two-wheeler vehicle is different from the one used in a car or the one used in garden equipment. Also, it is essential to keep in mind the current status of your battery. If your battery is completely discharged, there are only a handful of chargers that can revive your battery.

Charging Speed

The charging speed is a very important factor when it comes to buying a charger for your battery. The charging speed is dependent upon the total capacity of the battery as well as the output rating of the charger itself. Generally, low capacity batteries being charged with a high amperage charger will be charged significantly faster than high capacity batteries with low amperage chargers. Hence, you should keep that in mind before selecting the proper amperage for your battery charger. High charging speed will be advantageous when you are away from home and your battery discharges on the road.

Supported Functions

The main function of a deep cycle battery charger is to charge a deep cycle battery without any complications. But, as most of the devices we find in the market are smart in nature, there are also a few smart chargers present in the market that are capable of so much more.

The most essential feature found on deep cycle battery chargers is the maintenance related functionality that will give you all related information on your battery. With these chargers, you can find the existing state of your battery and make sure you are taking the necessary steps required to take proper care of your battery. An additional display on the deep cycle battery charger also helps a lot as it gives you precise information about the status of your battery.

Reliability

Electronic devices always pose an electric hazard, especially if you are dealing with high voltage applications like car batteries. Most car batteries are generally 12 volts which is more than enough for a hazardous incident while charging the battery. To avoid these situations, the deep cycle charger must have all the necessary preventive measures enabled on board.

These measures include overload protection, overheating protection, overcurrent protection, reverse polarity protection, and so on. To get the safest option, you should consider the safety measures present on the deep cycle car chargers and select the one which has all of the necessary measures included. This will make the charger reliable in the application and also keep your battery in perfect condition.

Conclusion

All vehicle batteries get discharged like any other batteries used in the electrical system. But, that does not mean you necessarily need to replace your car battery or go to a service station to get your battery recharged. You can purchase a dedicated deep cycle battery charger to fully recharge your battery. If you have gone through our picks for the best deep cycle battery chargers and our buying guide, you must have already made up your mind about which charger you are going to buy. If not, you can go with one of the following options.

  • If you are on a tight budget and your requirements are low, the Mroinge 6V/12V 1A Fully Automatic Trickle Battery Charger will be a perfect choice for you. It is the cheapest deep cycle battery charger in the market right now that supports 6 to 12 volts batteries. It is perfect for charging factory sealed maintenance-free batteries.
  • Most users prefer reliable long term options when it comes to vehicle tools and accessories. Hence, our next recommendation would be the ADPOW 5A 12V Automatic Smart Battery Charger. This unit features a lifetime quality warranty which makes it a reliable option for a long time. It is a smart battery charger that features 7 different automated charging processes.
  • Lastly, we will recommend the NOCO Genius 12V GEN5X2 Smart Battery Charger simply because it is the most premium and heavy-duty option present on our list today. This is a 2 bank battery charger that has 10 amp and 5 amp capacity per bank. It is designed to charge 12 volts batteries and also backed with a 3 years warranty period.



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