Best Deep Cycle Battery Chargers for 2021

Do you know, a good charger can add more value to your battery!? Additionally, the performance and the lifetime also depended on your charger’s capabilities.

Like other types of batteries, a deep cycle battery also needs the perfect charger for it as it needs to survive and serve for a long time.

We receive so many queries from our users about the basic features of a good quality deep cycle battery charger, how can they choose the right one for their batteries. If you get the wrong one at any chance, it may cause damage to your batteries.

So, choosing the best one isn’t too easy. You need to check the requirements carefully to find the suitable one. In this incident, we are here to help you as a helping hand to choose the best one.

In this buying guide, we have reviewed here top 5 models of the deep cycle battery charger that might be best for your battery. We reviewed details about them. Additionally, we have included a buying guide so that you can choose more perfectly.

Comparison Chart

Preview
NOCO Boost Pro GB150 3000 Amp 12-Volt UltraSafe Lithium Jump Starter Box, Car Battery Booster Pack, Portable Power Bank...
TECMATE OptiMATE 6 Ampmatic, TM-181, 9-step 12V 5A sealed battery saving charger & maintainer
Editor’s Choice
Battery Tender Plus 12V Battery Charger and Maintainer: 1.25 AMP Powersport Battery Charger and Maintainer for...
BLACK+DECKER BM3B Fully Automatic 6V/12V Battery Charger/Maintainer with Cable Clamps and O-Ring Terminals
BatteryMINDer 128CEC1: 12 Volt-2/4/8 AMP Battery Charger, Battery Maintainer, and Battery Desulfator
Product
NOCO Boost Pro GB150 3000 Amp 12-Volt UltraSafe Lithium Jump Starter Box, Car Battery Booster Pack, Portable Power Bank...
TECMATE OptiMATE 6 Ampmatic, TM-181, 9-step 12V 5A sealed battery saving charger & maintainer
Battery Tender Plus 12V Battery Charger and Maintainer: 1.25 AMP Powersport Battery Charger and Maintainer for...
BLACK+DECKER BM3B Fully Automatic 6V/12V Battery Charger/Maintainer with Cable Clamps and O-Ring Terminals
BatteryMINDer 128CEC1: 12 Volt-2/4/8 AMP Battery Charger, Battery Maintainer, and Battery Desulfator
Star Rating
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Prime Status
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Preview
NOCO Boost Pro GB150 3000 Amp 12-Volt UltraSafe Lithium Jump Starter Box, Car Battery Booster Pack, Portable Power Bank...
Product
NOCO Boost Pro GB150 3000 Amp 12-Volt UltraSafe Lithium Jump Starter Box, Car Battery Booster Pack, Portable Power Bank...
Star Rating
-
Prime Status
Preview
TECMATE OptiMATE 6 Ampmatic, TM-181, 9-step 12V 5A sealed battery saving charger & maintainer
Product
TECMATE OptiMATE 6 Ampmatic, TM-181, 9-step 12V 5A sealed battery saving charger & maintainer
Star Rating
-
Prime Status
Editor’s Choice
Preview
Battery Tender Plus 12V Battery Charger and Maintainer: 1.25 AMP Powersport Battery Charger and Maintainer for...
Product
Battery Tender Plus 12V Battery Charger and Maintainer: 1.25 AMP Powersport Battery Charger and Maintainer for...
Star Rating
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Prime Status
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Preview
BLACK+DECKER BM3B Fully Automatic 6V/12V Battery Charger/Maintainer with Cable Clamps and O-Ring Terminals
Product
BLACK+DECKER BM3B Fully Automatic 6V/12V Battery Charger/Maintainer with Cable Clamps and O-Ring Terminals
Star Rating
Prime Status
Preview
BatteryMINDer 128CEC1: 12 Volt-2/4/8 AMP Battery Charger, Battery Maintainer, and Battery Desulfator
Product
BatteryMINDer 128CEC1: 12 Volt-2/4/8 AMP Battery Charger, Battery Maintainer, and Battery Desulfator
Star Rating
-
Prime Status

Top 10 Cycle Battery Charger Reviews

1. NOCO Boost Pro GB150 4000 Amp 12V UltraSafe Lithium Jump Starter

NOCO Boost Pro GB150 4000 Amp 12V UltraSafe Lithium Jump Starter

NOCO Genius is a well known brand worldwide for making battery chargers. NOCO, the manufacturer, has brought this awesome charger with many innovative and helpful features. First of all, this charger is able to charge lithium ion and lead acid batteries at up to 4000 AMP charging rate. Basically this one can charge your batteries 2X faster. And the charger is compatible with most battery types such as marine batteries, trolling motor batteries etc.

This is a 12 volt and 6 volt charger as well as a battery maintainer. This charger has the ability to repair your damaged batteries besides maintenance. The cutting edge technology of the charger delivers you superior performance. Additionally, this charger can be used with vehicles of micro-hybrid start-stop and CANBUS type electrical systems.

The innovative streamlined design of the charge has made this portable, incredibly lightweight and ultra compact (7 x 12.3 x 2.7 inches). Additionally, this charger offers a rubberized base and external mounting holes that avoid scratches and surface slipping. On the other hand, the charger is Ultra Violet (UV) ray and water (IP65) resistant so you don’t need to be worried about protection.

This device has the ability to monitor battery activity to ensure efficient & safe charging. This feature minimizes the energy consumption as well as overcharging protection & reserve polarity. However, this charger comes with included spark proof technology. Another amazing feature is the charger has intuitive LED light indicators that provide charging state feedback visually. Additionally it provides diagnostic information too. This is always active even when the charger is in maintenance mode.

What we liked

  • Cutting Edge Technology;
  • Effective LED indicators;
  • Water (IP65) & UV resistant;
  • 2X faster charging capability;
  • Able to maintain the batteries also;
  • Elegant design.

What we didn’t like

  • Cable could be longer.

2. Schumacher 1.5 AMP Charger

The Schumacher SEM-1562A-CA 1.5 Amp is one of the famous deep cycle battery chargers. This pretty good charge can charge both 6 volt and 12 volt batteries. This is a microprocessor controlled battery charger. The innovative microprocessor controlled charging system is the easiest way as well as a safe system for the batteries. Microprocessors can charge and maintain the batteries at optimal power level. Also, the charger can give you a speedy & convenient experience. 

This innovative charger also offers automatic voltage detection which determines whether the connected cell is 12 volt or 6 volt automatically. This feature eliminates the possibility of damaging the batteries. Because choosing the wrong setting can harm the battery. This smart feature can process automatically charging and maintaining multi batteries once your batteries are identified. 

The charger has a constant monitoring battery feature which can charge the batteries efficiently, accurately and swiftly when needed. This feature also allows the charging cycle to click ON/ OFF in the same way. For this feature, your batteries can be attached with the charger for storage indefinitely without any kind of risk of damage or overcharging.

Additionally, this innovative charger has automatic temperature compensation that can adjust with minimum maintain voltage & maximum charge voltage based on ambient air condition. The thermal runaway of the charger reduces the current if the charge detects the battery is getting too hot, and this is an automatic process.

Unless it finds a proper connection existence, it keeps the power from flowing with its “auto Start” feature. However, the Desulphation mode allows the batteries to be left disconnected for an extended time period. It also keeps the batteries ready overnight in the cold season.

The dimension of the charger is 7×7.5×11 inches. The charger is compatible with most batteries for classic cars & motorcycles, small batteries, ATVs batteries, boat batteries or marine batteries as well. Also, the LED light indicators and the automatic switch are wonderful and added more value to this charger.

What we liked

  • LED light indicators;
  • Automatic On/ Off switch;
  • Compatible with Both 6 & 12 Volt batteries;
  • Full microprocessor controlled charger;
  • Float mode prevents overcharging;
  • Ideal charger for keeping batteries in storage;
  • Rough plastic housing for charger.

What we didn’t like

  • Low quality cable;
  • Cable could be longer.

3. Tecmate OptiMATE TM-181 Charger

Tecmate OptiMATE TM-181 Charger

The Tecmate OptiMATE TM-181 is another amazing charger from our top picks. This is the most advanced deep cycle battery charger. This fully automatic charger is a 12 volt charger as well as battery tester and maintainer. This smart charger can recognize the difference between sulphated & discharged batteries that other chargers can’t.

This charger offers charging from a low volt of 0.5 along with 2 steps of desulphation recovery. This charger has a waterproof case so you don’t need to worry about damage by water. On the other hand, the charger offers wall mounting and standard battery clips. The battery offers 100-240 volts 56-60 Hz of input with fully sealed high efficiency.

The charger has automatic control with the cell of ampmatic current. Additionally, another innovative feature is that the charge warns you early of any battery problems. Also, the battery has automatic storage control that optimizes the battery power & battery life. This one is perfect for long term maintenance of any sizes of 12 volt lead batteries for marine, deep cycle, automotive or motorcycle.

The multi phase desulphation of the charger helps batteries from being dead early. The smart Ampmatic control can easily adjust the current to connected batteries of any size (3-240 Ah). It is able to charge your battery faster and the automatic and interactive float charging mode is enabled when the battery gets full charge. This package is a 3 in 1 solution- charger, tester & maintainer. The dimension of the charger is 12.3x7x3.4 inches.

What we liked

  • Full automatic charger;
  • Able to optimize battery power & life;
  • Offers Ampmatic current control;
  • Fully sealed charger with included waterproof case;
  • Provides early warning for battery problems;
  • CEC listed high efficient charging;
  • Automatic storage control of batteries for 24×7.

What we didn’t like

  • A little bit pricey;
  • You charge only 12 volt batteries where other chargers offer both 6 & 12 volt charging.

4. Battery Tender Plus 021-0128 Charger

Battery Tender Plus 021-0128 Charger

This one is a smart deep cycle battery charger from the manufacturer named Battery Tender. This is a smart charger that offers 4 steps of charging. Those are Initialization, Absorption, Bulk Charge and Float Mode charging. The charger is designed to maintain & fully charge a battery in a proper storage voltage without any kind of damage that can be caused by tickle chargers. Additionally, this charger comes with included quick connect harnesses that are hard to reach.

This charger has an automatic switch feature that enables the mode to float when the battery gets full charge. On the other hand, the charger also offers a temperature compensated feature to ensure optimum charging voltage according to the ambient temperature. The charger is able to charge the batteries faster as well as it has safety features against reverse polarity.

This charger can charge as fast as 3a charger or faster. The Green & Red indicators of the charger help to operate the operation easily. The lights flash in various conditions alternatively. The charger comes with included Alligator clips and battery tender ring terminal. The dimension of the charger is 11x4x11 inches.

What we liked

  • Safety feature against reverse polarity;
  • Fast charging capability;
  • 4 steps of charging program;
  • Green & Red indicators;
  • Temperature compensated feature;
  • Presents automatic switch from full charge to float charge mode.

What we didn’t like

Power cord could be longer.


5. Black & Decker BM3B Charger

Black & Decker BM3B Charger

The Black & Decker BM3B charger is a smart charger that can charge both 6 volt and 12 volt battery systems. This charger is compatible with almost all types of battery such as Gel, Wet and AGM batteries. This is a compact charger with a built-in mounting option. The dimension of the charger is only 5×9.8×3 inches.

This device has included vehicle DC plug, “O” ring terminals and battery clips so along with these, the charger offers a very easy connection with vehicle batteries. It is able to keep optimal charge to the battery with smart and high frequency charging technology. 

The charger has an automatic switch feature that enables the mode to float when the battery gets full charge. Also, the charger offers a floating mode monitoring system. With the built in mounting bracket, the charger can be mounted easily.

This charger is compatible with various types of batteries like antique & classic car battery, RV battery, vehicles battery, deep cycle battery, lawn mower battery, ATV battery, snowmobile battery, personal watercraft battery, motorcycle battery and many more. The DC connector cable for vehicles is a great addition to this charge and it adds more value. And, along with charging the batteries, this one is a battery maintainer too. This charger can also take care of your battery and ensure longer life and performance of the battery. Additionally, this charger also has safety protection against dust, oil and moisture.

What we liked

  • Compatible with both 12 volt & 6 volt batteries;
  • Built in mounting bracket;
  • Protections against oil, dust and moisture;
  • Vehicle DC plug, O ring terminals & battery clips;
  • 1.5 Amp charger and maintainer;
  • Suitable for AGM, Gel & Wet battery types;
  • Smart charger with smart switch.

What we didn’t like

  • Low charging rate; take more time to charge larger batteries.

6. BMK 12V 5A Smart Battery Charger & Maintainer

BMK 12V 5A Smart Battery Charger & Maintainer

All the batteries and their chargers are claimed to be ‘protected’ from overheating, overcharging, undercharging or reverse polarity. Only a few can be found with waterproof and dustproof features. This charger from BMK is water and weather protected so it is safe to use in boats, RV and other deep cycle batteries. It only works for 12v batteries. Nothing more or less than that won’t be appropriate for this charger. With its 5 amp charging capability, it takes 24 to 48 hours. 

Its multiple smart charging steps makes charging safe. Only a little rise in the temperature is all you can complain about. When that happens, just unplug the charger and battery and charge again when it cools off. However, you will find numerous deep cycle battery chargers at this price point. But there is hardly any good quality maintainer at this price.

Things We Liked

  • Cheap price;
  • For high-quality batteries;
  • Comes with 2 types of connectors;
  • Water and dust proof. 

Things We Didn’t Like

  • May heat up upon overuse.

7. Schumacher 6V/12V Automatic Battery Charger

Schumacher 6V/12V Automatic Battery Charger and 12A Maintainer

For regular deep cycle and AGM type batteries of 6v or 12v requires a simple charger which will double as a maintainer as well. As a maintainer, this unit serves 12A current. There is no chance of overcharge because a microprocessor auto adjusts the amperage rate and fixes as needed. 

On the other hand, it also has a reverse hook-up protection system. The system hinders it from charging when the clamps are reversed. This way, this charger protects the batteries from reverse polarity.

For your ease, there are different modes for different purposes. Like the charging mode there is also a float mode that ensures the batteries maintenance. The only thing to complain about this charger is its customer service. It is nonresponsive and almost nonexistent. Which makes it a risky buy; if you purchase from a less trusted seller, it can’t be returned.

Things We Liked

  • Energy efficient;
  • Maintainer as well;
  • Protects from overcharging and reverse polarity.

Things We Didn’t Like

  • Not high end;
  • Only for deep cycle batteries. 

8. BatteryMinder: 2/4/8 AMP Battery Charger

2/4/8 AMP Battery Charger, Maintainer & Desulfator for 12V Automotive Batteries

The different amperage settings and ability to charge several batteries at once makes this charger money saving. With one charger you can charge batteries of different conditions from good to worse. The desulfation of this charger gives life to decades-old batteries on which you may have lost your hope. 

The voltage level adjusts automatically through the temperature sensor. The charger simply detects the temperature and fixes the voltage as per requirement. Besides, with a Y connector, you can charge up to 8 batteries with this charger. A great hack to save money. A clip connector, quick connector and ring terminal are coming in the package with charger and temp sensors.

The price is somewhat higher compared to other chargers we have reviewed. But this charger never fails,  nor will it give you a headache. In fact, it will help you to save bucks by purchasing different chargers of different amperage. If you own several automotive batteries, then this desulfator cum charger is all you need.

Things We Liked

  • Easy to use;
  • Multiple amperages;
  • Useful to prevent sulfation;
  • Capable of charging multiple batteries at a time. 

Things We Didn’t Like

  • No cons.

9. Energizer- 2 Amp Battery Charger

2 Amp Battery Charger & Maintainer for 6/12V Batteries with 7 Step-Smart Charging Technology

The ENC2A battery works for almost any automotive and marine batteries of 6V and 12V. It also has 2 different connectors so that it can be paired to n#any types of battery you want. It is cheap yet backed by a long 5 years of warranty, what more do you expect?

We chose this battery charger for reviewing because it was ‘smarter’ than other chargers. Its charging process involves 7 identical stages that help to maintain, repair and charge the batteries safely and sound. First, it will diagnose the battery whether it is worth a charge or not. Secondly, in the pre-charge stage, the charger supplies small current to prep up the battery for a big load ahead. Thirdly, with a soft start, the actual charging process starts.

In the following stages, with continuous current and voltage, the charging goes on. When the charge is full, it automatically disconnects the battery. If the charger is left connected and the battery falls below 12 VDC then that charging will resume.

There is a 50/50 chance with the performance of this battery. You must keep in mind the requirement of the charger while using. A wrong application may damage both the battery and charger.

Things We Liked

  • 2 types of connectors;
  • Compatible to a wide range of batteries;
  • Cheap price;
  • UL std approved. 

Things We Didn’t Like

  • Slow charging for low voltage batteries.

10. BLACK+DECKER 2 Amp Charger for 20V Lithium Battery

2 Amp Charger for 20V Lithium Battery

The most significant thing about this charger is, it gets the job done in less than an hour. The advertisement says, it is only for lithium-ion batteries from the same makers. But it practically goes with any Li-Ion batteries of 16V to 20V we use in cordless power tools. 

The charger merely weighs a pound and sizes 8.2 x 4 x 9 inches. There is an indicator light to indicate when the battery is full. The package includes a pair of Battery Pack so that you can charge one when the other one is being used; very handy isn’t I? So, the price that seemed higher at first makes sense now.

For professionals, it is a must-have in their workshop to stay prepared all the time. Apart from the reasonable price and useful accessories, a long and promising warranty has been offered for this charger.

Things We Liked

  • Fast charging;
  • Optimizes batteries;
  • Comes with accessories;
  • Long warranty. 

Things We Didn’t Like

  • Only for limited Li-ion categories.

What Size Charger Do You Need

Well, people usually ask what size charger they need for their deep cycle batteries. To answer this question, you need to know how many AMP/ Hour do your batteries store. The size of the charger depends on it mainly. It is known to all that more current putting in the battery means faster charging.

But a large charger on a small battery is harmful as it leads to venting and boiling electrolyte. This damages the battery and shortens the battery life. For the better idea to find out what size charger you need, you need to know the following things.

  1. Flooded battery can accept a 25% charge rate of its capacity.
  2. Gel batteries can accept a 30% charge rate of its capacity.
  3. AGM batteries can accept 40% charge rate of its capacity.

This means charge is accepted by the battery depending on battery chemistry. For instance, if you have a 100 Ah flooded battery, then it will be recharged with a 25 Ah or less charger in about 4 hours. Even the battery was completely dead. If you are in a hurry, then you need a large charger, but if you aren’t in a hurry then it’s better to go for a smaller one.

Buying Guide

Choosing the right charger is very important for your battery as your battery life and performance are also dependent on it. if you pick the wrong charger, then you won’t get the desired performance from your batteries. To choose the right one, you need to look after 3 major requirements.

Battery Type

There are various types of batteries such as Absorbed Glass Mat (AGM) batteries, Flooded (Wet Cell) batteries and Gel Cell or Valve- Regulated Lead Acid (VRLA) batteries. Generally, one charger can charge all types of batteries except Gel Cell. So, check your battery type before choosing.

Read more: 4 Bank Marine Battery Charger – Top 5 Picks By Experts

Battery Size

Well, we do not mean the physical size of the battery by saying that. We are talking about how many Amperes hours your batteries store. For instance, if you have a full size typical auto battery that is of 50 AMP hours and you choose 10 Amp charger, then it will take 6 hours to recharge the battery fully even if the battery were dead completely. For another example, a 100 AMP hour deep cycle marine battery requires a 10 AMP hour charger for about 11 hours to fully recharge a nearly dead battery.

To calculate the total charging time, take battery AMP hours rating and divide it by charger AMP rating. And then add 10% extra time to complete charging fully. Now, select a charger for your battery. You may choose a smaller AMP rating charger if you’re not in a hurry.

Desired Outcome

If you need the charger for a motorcycle, aircraft battery, classic car, trolling motor battery or wheelchair battery, then a low AMP charge will work fine. But if you need to charge quickly, then you need a powerful and fast charger. So, choose a charger by thinking about the outcome of the charger.

And don’t forget to check the special, safe and innovative features like water & UV ray proof or other smart capabilities.

Battery Chemistry

Another important thing you should consider before buying a deep cycle battery charger is battery chemistry. Because generally, you can’t use a lead acid battery charger to charge a gel unit or vice-versa. Only if the battery clearly mentions that you can use one charger to charge both of them.

How Many AMPs Do I Need

Deep cycle battery chargers come in different amp ratings. So you must check the number of amp hours that your battery can store, with which you’ll be able to decide which one your battery needs.

You also need to calculate how long the amp charger takes to charge your battery simply by dividing the amp hour with the amps the charger has.

Conclusion

Hopefully, we could have helped you to figure out the best one for your batteries. We picked the top 5 deep cycle battery chargers with a detailed review. We highly recommend these chargers as they have the abilities to take proper care of your batteries.

Additionally they are able to satisfy users and they did. Just pick that one which is mostly fit with your applications. And if you have any question or inquiry then just leave your valuable comment. We’ll get you soon. Best of luck.

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