10 Best Deep Cycle Battery Chargers In 2023

Batteries are a part of our everyday machinery starting from our cars. Buying a battery without purchasing the right charger for it can be highly frustrating especially when faced with an emergency.

If you’re reading this article, you’re most probably looking to buy a new deep cycle battery plus a charger for your automobile; or you already own a deep cycle battery and you’re looking for a deep cycle battery charger.

10 Best Deep Cycle Battery Charger Reviews

#1. BMK 12V 5A Smart Battery Charger

BMK 12V 5A

BMK is a 5A smart, deep cycle battery charger. It is specially designed to ensure that the battery is charged and maintained without causing the damages caused by trickle chargers. It’s suitable for batteries with 15-100Ah.

To start with, it has a constant pulse current maintenance function to avoid overcharging or over-discharging the battery. This is just one of the multi-protection properties this charger has to ensure that your deep cycle battery lasts for long.

The BMK charger is IP65 waterproof certified which makes it suitable for use even on marine vessels. The charger has short- circuit protection which automatically turns off the battery to prevent dangerous occurrences.

The battery has four stages of charging your battery and led indicators which show the progress of the charging process. These stages are: desulfating the battery; bulk-charging up to 80%; absorption till the battery is full and maintaining your battery charge through pulse charge.


  • IP65 Waterproof
  • Multi-protection properties
  • Suitable for many vehicle types


  • Not able to identify void batteries
  • Issues with durability

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#2. NOCO Boost Plus GB40

NOCO Boost Plus GB40

The NOCO GB40 is one of the most potent deep cycle battery chargers built for 12V deep cycle batteries. Apart from it being an excellent charger for your battery, it’s handy in jump-starting your diesel based car or boat.

When fully charged, the GB40 is capable of delivering 1000Amps (7,000jls) to your battery which is equivalent to 20 jump starts. It features spark proof technology which ensures safe and error proof use as it indicates when you incorrectly connect your battery. The battery has reverse polarity protection as well which makes it even more reliable.

The NOCO GB40 can hold its charge for up to one year if fully charged. It also has USB outputs which allow you to charge any of your USB devices.

The GB40 comes integrated with LED flashlight with seven modes of flashlight including emergency SOS lights which are very useful at night.


  • Have multiple applications such as charging your battery and all USB devices.
  • Safe and stress-free to use.
  • It’s compact and light to carry around.
  • Has a very high capacity to carry out up to 20 jump starts.


  • The charger has a limited number of ports.
  • Useful for 12v batteries only.

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#3. Guest 2711A ChargePro.

Guest 2711A ChargePro

Guest 2711A ChargePro is an automatic 10amp deep cycle 12V flooded, gel and AGM lead-acid battery charger with 5-stage charging algorithm. These stages are analyzing your battery, pre-charging, normal charging, conditioning your battery and auto-maintaining your battery once it’s fully charged. All these stages are meant to keep your batteries performance at its best while providing an extended battery life.

The charger integrates in-line safety fuses which provide reverse polarity, over-current, and over-voltage protection. This increases the safety of your battery during any charging process.

Another useful feature of this charger is that it’s IP67 waterproof making it suitable for marine and extreme weather use.

The Guest 2711A ChargePro can charge up to 3 batteries at once and has lead indicators providing the status of each cell through the charging process.


  • IP67 water resistance
  • Shockproof
  • Can charge multiple batteries
  • Interactive led lights


  • The display can be faulty after a while
  • Spare parts are hard to find
  • Tends to get hot while charging

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#4. Battery Tender Plus 021-0128

Battery Tender Plus 021-0128

The 1.25amp deep cycle battery charger is a smart charger which can be safely left connected to your battery to maintain its charge without destroying the battery through trickle effect.

The charger has safety measures such as polarity protection and its spark proof which ensures easy usage with 100% user protection. When it’s in reverse protection mode, the red and green light indicators flash alternatingly as a safety signal to the user.

It has a 4-stage charging process, i.e., initialization, bulk charging of your battery, absorption mode and then float mode. When the battery is full, the charger automatically turns into float/maintenance mode keeping your battery safe and at its optimal charge.


  • Convenient- compact and light
  • Spark and reverse protection properties
  • Protects your battery from overcharging


  • Not suitable for marine or extreme temperature use
  • Has small alligator clips
  • Faulty indicators

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#5. CTEK (56-863) MUS 4.3

CTEK (56-863) MUS 4.3

CTEK MUS 4.3 is one of a kind as it has an 8-stage charging process aimed at extending your battery life and keeping it at optimal conditions. The CTEK is suitable for charging 12V batteries at 4.3amps.

The eight charging steps involved in the charging process are the desulfation stage, soft charge start, bulk charging, and absorption, analyzing your battery, reconditioning, float mode and pulse mode.

The CTEK MUS 4.3 has multiple protection properties. These include short-circuit protection, waterproof, dustproof, reverse polarity protection, and spark protection. All these are aimed at ensuring the safety of the user and the battery.

The fact that it’s waterproof and dustproof makes it an all-weather deep cycle battery charger and very useful in marine vessels.


  • Have safety measures to protect your battery and automobile.
  • Has multiple applications


  • Tends to get too hot during the charging process.
  • Faulty indicators.

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#6. NOCO Genius G3500

NOCO Genius G3500

NOCO G3500 is one of the most advanced deep cycle batteries from NOCO Genius. The charger is suitable for all 6V and 12V lead and lithium batteries up to 120Ah.

The deep cycle charger has protection features to ensure the safety of the user and the battery. These features include spark protection, reverse polarity protection, and overcharge protection.

The NOCO Genius G3500 is also IP65 UV and water resistant making it useful in extreme weather vessels. It’s small and compact making it easy to carry and use in your automobile.

The deep cycle charger has an embedded microchip in its motherboard which allows it to monitor the condition of your battery. When your battery is fully charged, the charger automatically goes into the maintenance cycle preventing an overcharge of your battery and ensuring that your battery runs at its optimum conditions.


  • Charges both 6V and 12V deep cycle batteries.
  • Efficient and durable
  • Have safety precautions for the user and battery.
  • Low energy consumption


  • Takes long to reach full charge.
  • Confusing user manual

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#7. Black + Decker 2Amp charger

Black + Decker 2Amp charger

Black + Decker is a deep cycle battery charger made for 12-20V deep cycle lithium-ion batteries. They are useful in maintaining the charge of the battery and not for fixing dead batteries.

The charger allows for two batteries to be charged at once making it a good investment. It’s one of the few deep cycle battery chargers that come with DC plugs allowing you to recharge them in the car.

The battery is compact, but a little heavy for its size, making it easy to carry in your car and use.

It has a fast charging rate which takes only 45 minutes to charge a 1.5Ah lithium slide pack battery. It also has led lights which allow you to follow through the charging process.


  • Efficient in charging deep cycle batteries
  • Multi-volt charging properties
  • Small and compact


  • Only works with Lithium-ion batteries
  • Blurred indicators

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#8. Energizer ENC4A

Energizer ENC4A

The energizer ENC4A is a 4amp deep cycle battery charger suitable for both 6V and 12V batteries. The charger optimizes the charging system through a 9-step charging process which ensures your battery life extension and that it’s working at optimal levels.

The charger has a voltage detection system which automatically detects 6/12v batteries to ensure that they are charged correctly. When the battery is full, Energizer ENC4A can immediately change its voltage from 4amp to 2amp for maintenance mode.

During the charging process, the LED display provides an accurate status of the charging progress and displays the battery voltage.

It has inbuilt protection features against overcharging, short circuit and reverse polarity. These measures keep both the battery and user safe.

The ENC4A is waterproof making it a good companion for marine vessels.


  • Has protective features
  • Compact and light to carry in your car
  • Suitable for both 6/12V batteries


  • Slow charger

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#9. Schumacher SC1319

Schumacher SC1319

Schumacher SC1319 is a deep cycle battery charger for charging and maintaining 6V and 12V deep cycle batteries. It has a voltage detection system which enables it to detect 6V and 12V batteries automatically.

This charger ensures that the batteries are functioning at their level best and that they’re protected through an inbuilt microprocessor.

When charging the SC1319 uses a multi-stage charging process which has several stages such as desulfation which extends your battery life. Once the battery is full, the charger automatically switches to float mode which monitors and maintains optimum battery charge.

The chargers have reverse polarity protection and short-circuit protection to protect itself, the battery and the user.


  • Automatic battery protection
  • Has inbuilt protective features
  • Works for both 6V and 12V batteries


  • Overheats
  • It’s rather noisy
  • Faulty indicator lights

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#10. BatteryMinder 128CEC1

BatteryMinder 128CEC1

BatteryMinder 128CEC1 is a smart, deep cycle battery which does what the name suggests. It minds about your 12V batteries safety and optimum performance.

The charger uses a 7-stage charging process which includes: Analysis, desulfation, soft charging, bulk charging, absorption, desulfation test, and a maintenance mode.

It runs a full time desulfation process using a wide range of high frequencies to ensure that both the old and newly formed sulfate crystals are dissolved.

The charger has protective features such as short circuit protection, overcharge protection, reverse polarity protection, and thermal protection ensuring maximum protection for the battery, the charger, and the user.

The charger has ambient temperature sensors which allow the battery voltage to change according to the surrounding temperatures. This ensures proper charging of the battery no matter the conditions.

When charging a deep cycle battery using the 128CEC1, it’s recommended that you use the 4amps settings.


  • Fat charging
  • Has safety precautions
  • It continuously prevents sulfation


  • Weak display panel.

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What is a Deep Cycle Battery Charger?

A deep cycle battery charger is a charger specifically made to charge deep cycle batteries at a faster rate. They help to maintain the life of your charger and keep it at optimum working conditions.

Differences between Deep Cycle Battery Chargers vs. Regular battery Chargers

Deep cycle battery chargers are uniquely made to charge deep cycle batteries. Unlike the regular batteries, deep cycle batteries have thicker plates which require specific charges to charge them. This is where deep cycle chargers come in as they can handle such thick plates.

Tips for battery longevity

  • Monitor your battery charge and always charge it before it hits 20%. This increases your batteries life.
  • Prevent sulfation by using a charger which runs a desulfation process
  • Avoid stratification of your battery by always charging it to its full capacity.
  • Carry out periodic equalization, i.e., low current charge after your battery is full for two to three hours.
  • After charging and using your battery, give it a resting period to avoid burning it out.

How to Pick the Right Battery Charger?

Battery chemistry

Deep cycle batteries have different chemical compositions, e.g., lead batteries and gel batteries. Choose a charger that is explicitly used to charge the type of chemical your battery carries.


Some deep cycle batteries are not suitable for extreme conditions such as marine environments. Choose a deep cycle battery charger that can tolerate the environment it will be used in.

Size of your Deep cycle battery

This means the capacity of your battery in terms of its amp hours. Always pick a charger which takes the least time to charge your battery to full charge. For example, select a 10amp charger to charge a 100 amp hour’s deep cycle battery.


Can I use a deep cycle battery charger on a regular battery?

Yes, you can. Although a deep cycle battery and a regular battery are a bit different in that they have different plate thickness, a deep cycle battery charger can be used on either of them.

What is the right Deep cycle battery charger to use?

The right battery charger to use is the one that conforms to your battery features and can be used comfortably in the environment where your battery is situated. Some are waterproof, and some are not meaning that not all chargers are suitable for all conditions.

How long does it take to charge a deep cycle battery?

The time taken to charge a deep cycle battery depends on the number of amp hours it can store. It also depends on the amps of the deep cycle battery being used.

Can you overcharge a deep cycle battery?

A deep cycle battery should not be overcharged. If overcharged, the battery forms voids in the gel which decreases its capability perpetually.

Final Verdict

Our deep cycle batteries require the best maintenance possible, and one way of doing that is by using a good deep cycle battery charger. As seen in this article, deep cycle batteries keep us from tricky situations such as a dead battery when going to work or during a road trip.

The Team That Worked On This Review

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