Best Deep Cycle Battery Charger (2022 Reviews)

Deep-cycle batteries are often found in appliances that require gradual release of power over a long period of time when there is no other power source available. In comparison to other batteries, such as starter batteries, deep-cycle batteries are more complex when it comes to looking after them, so they need your tender love and care. In order to ensure the maximum efficiency and lifespan of your deep-cycle battery an investment in a quality charger is essential.
Here we take a look at some of the best deep-cycle batteries on the market and what you need to consider when choosing the best deep-cycle battery charger for your needs, whether this be for trucks, marine use or recreational vehicles. If you are after a deep-cycle battery charger, then you can be sure to find one for your needs below.

Table of Contents

Best Deep Cycle Battery Charger For Rv Battery

Schumacher SC-1200A-CA SpeedCharge Automatic Battery Charger Review

With up to 12 Amps on offer, the Schumacher SC-1200A-CA can rapidly get a dead battery juiced up and fully charged ready to start your engine. The 12A rapid charge function means it can charge your RV battery up to twice as fast as standard chargers, whilst the onboard meter is able to read your battery and give an estimate of the battery charge (as a percentage), so you can plan for your departure.
A great feature for extending battery life is thanks to the charger’s microprocessor control. This means you can be sure that the charger will decrease the charging rate as the battery charges, helping to minimize the possibility of damage. The auto kick down function switches the charger down to maintenance (acting like a trickle charger) mode once your battery reaches full charge, which will extend your battery’s life.
This charger quickly charges and maintains everything from conventional automotive batteries, to deep-cycle and both AGM and gel cell batteries. You can also be sure of the safety of this device with its excellent safety features, such as preventing turning on until it has been hooked up, so no need for sparking plugs!
If you’re looking for the best RV battery charger, this lightweight, portable, and easy-to-use device will make you smile and help you to keep your RV battery on the road for years to come.

Q&A: How long are the cables?

A: Both the chord for the cables and the chord for the power are 6 feet long.

Q&A: How do you set the charger to desulfation mode?

A: You don’t have to, the computerized charger analyses the battery and, if it determines the battery is sulfated, will try and repair it.

Best Deep Cycle Battery Charger For Truck Battery

BatteryMinder 128CEC1 Battery Charger-Maintainer-Desulfator Review

If you are looking for a deep cycle battery charger that will be the best for a truck battery then you should look no further than this excellent BatteryMinder – the all-in-one charger, maintainer and desulfator. This automatic, full-time worker will help extend your battery life by reversing sulfation using high frequencies to both safely remove sulfation and recondition weakened batteries. This process alone can help extend your battery life by up to 4 times in comparison to improper maintenance.
The inbuilt ambient temperature sensor means this charger will work well whatever the conditions as it adjusts battery voltage based on temperature sensor readings. So you can be sure your battery will always be properly charged. The excellent safety features, including short-circuit and overheating protectios, as well as reverse polarity, means you can use this charger worry free.
An excellent feature of this charger is that it can maintain up to a whopping 8 batteries at a time when they are connected in parallel, although the connectors required to do this are not included so you will have to buy those separately. The FCC certification means this product comes with guaranteed efficiency at low consumption cost.
The 90-240V AC 47-63 Hz input means this product can be used worldwide and has the power to charge up even the most deeply discharged trucks. You will have to select the right amperage with this charger though, so just make sure to use the 4Amp setting if you are charging a large deep cycle battery. If you want to bring batteries back to life, this brilliant charger will not let you down.

Q&A: What does FCC stand for?

This stands for the Federal Communications Commission meaning products with certification from this body have had to meet strict energy efficiency guidelines set by both the US Environmental Protection Agency and the Department of Energy.

Q&A: Could I install this charger in my motorhome?

A: Yes, this charger has the capacity to work well in such a setting.

Best Deep Cycle Battery Charger For 24v Battery

Battery Tender 022-0158-1 Battery Charger Review

If you’re looking for extra power in a 24V battery charger, which doubles up as a battery tender, then you will not be let down by this model from Battery Tender. The unit is fully mountable, waterproof, solidly made and has excellent vibration resistance, whilst the two-year warranty will give you peace of mind. This high current portable charger really packs a punch!
This highly portable device comes with 4 stage charging, helping to ensure extended battery life by fully recharging batteries after use, without the worry of overcharging. The excellent safety features include reverse polarity as well as short-circuit protection and a 72-hour safety timer, thus preventing the risk of fire, explosion or a smoking unit!
The Battery Tender 022-0158-1 also works great with aeroplane batteries, helping to ensure prompt start-up if you are irregularly getting use out of it. If aeroplanes aren’t your thing it is also great at preventing the need to jump-start vehicles which are often having to be left sat idle for a few weeks, such as motorhomes, by helping to ensure the battery stays charged up.
This versatile unit also comes highly recommended to be used in conjunction with 24-volt portable solar generators thanks to its ability to maintain an appropriate voltage and not charge too high. So if you’re looking for consistent, yet versatile, extra voltage capabilities from your battery charger, you can be confident in this Battery Tender for a wide variety of your charging needs.

Q&A: Does this battery charger work with AGM batteries?

A: Yes, it does indeed!

Q&A: I have a 24-volt system, with 4 6 volt batteries in series, on my boat, will this charge them?

A: This is quite a common configuration and will certainly be kept charged up.

Best Deep Cycle Battery Charger For Lead-acid Battery

NOCO Genius G750 6V/12V 75A UltraSafe Smart Battery Charger Review

This great value lead-acid battery charger from NOCO’s excellent product range offers both 6-volt and 12-volt charging and maintenance for up to 30 amp-hours. If you’re looking for one of the safest chargers around for deep cycle, automotive, RV, and/or marine batteries, then this is the perfect option for you. The ultrasafe design, spark-proof technology and reverse polarity and overcharge protection mean this device can be left safely connected 24/7.
This is not just the best for 12V battery charger. This charger will actively monitor your batteries health and also repair discharged and sulfated batteries helping to drastically improve both battery life and performance. The onboard microcomputer acts as its guide, making this gadget easy to use to help you achieve maximum efficiency in charging. It also has excellent efficiency ratings thanks to inbuilt energy minimization technology.
Other useful features include its UV, impact and water-resistance, whilst its easy-mounting design will help you quickly install it on any AC wall outlet. The easily understood LED system also helps you to diagnose your battery needs. You will also be pleased with the inclusion of X-Connect battery clamps with this product as it is designed to work with120-volt 50-60Hz electrical systems.
This device offers highly recommended deep-cycle repair having been effective on some of the most mistreated batteries. Get yours bought in early and your battery will be saved before you can hurt it.

Q&A: How should I charge my 12V battery if it has dropped below 7V?

A: You can use the 6V mode, to begin with, choose the option ‘SMALL NORM’ mode for Gel Cell and Wet Cell batteries or ‘SMALL COLD/AGM’ mode for AGM batteries. Once the LED light turns o a solid Green you can return the battery charger to 12V ‘SMALL’ charge mode.

Q&A: Does the G3500’s “repair” feature (desulfator) only apply to 12v batteries?

A: Unfortunately that is the case, however, you can bring your battery up to the required repair voltage, as described above.

Best Deep-cycle Battery Charger For Agm Battery

Schumacher SE-70MA 10 Amp Fully Automatic Deep-Cycle Charger Review

With over fifty years experience in the electronics industry, Schumacher Electronic Corporation are a brand you can trust. This 10Amp fully automatic charger is the best deep-cycle battery charger we have seen for AGM battery.
This charger can be used to bring deep-cycle AGM batteries back up to full charge when they are depleted and then will maintain the charge so that when you need to use it, it is fully juiced up. This has one of the best microprocessors around so if you want your battery to last with minimal effort, this is the one for you.
You can also be confident in leaving this deep-cycle charger plugged in, as it is protected from overcharging your batteries and also has reverse polarity protection so it won’t overheat. While being an automatic charger, it also has the option to switch to manual operation should you need this for special applications.
This Schumacher battery can cater to the needs of both 12 and 24-volt deep-cycle batteries, and it is also able to charge automotive batteries as well as deep-cycle batteries. This is a great all rounder and comes at a superb value for the quality of this product.
In terms of speed, this 10 Amp charger can fully re-charge a deep-cycle battery in 7-11 hours, not bad considering this charger sits at the cheaper end of the market. Sure-Grip Clams are also included.

Q&A: Does this charger work with Optima batteries?

A: Yes, this Schumacher deep-cycle battery charger works well with Optima batteries.

Q&A: What is the warranty period on this product?

A: This deep-cycle battery charger comes with a – year warranty.

Best Deep Cycle Battery Charger For Marine Battery

NOCO Genius G4 6V/12V 4.4A 4-Bank UltraSafe Smart Battery Charger Review

Just like the previous NOCO Genius on this list this NOCO unit puts other deep cycle marine battery chargers to shame. At a midrange price you get a charger at both 6 and 12 volts, that also doubles as a maintainer for lead-acid batteries for up to 30 amp-hours. This comes complete with an ultra-safe design offering spark-proof technology alongside both overcharge and reverse polarity protection. With this security, at this price, how can you say no?
Without a shadow of a doubt, if you are looking for the best charger for boat battery, that can easily help you rescue batteries from their deepest depths, then opting for this charger will do you no harm. This charger will have you ‘suped’ up in double speed thanks to its extra-fast charging, whilst also repairing any damage thanks to its innovative inbuilt microprocessor.
The external mounting capacity, AC chord management system, sturdy and both UV and waterproof design means you can be confident in installing this wherever is easiest whether this be on your boat or as and where required. This product has been tested against some of the toughest conditions and held its own, so if you like the rough and tumble this product can fit right in with you.

Q&A: Can I use this to charge a deep cycle marine battery?

A: This charger works great to restore, repair and recuperate batteries often left neglected on boats.

Q&A: I’m aware that slow charging helps extends battery life, is this possible with this charger?

A; This charger gives a truly deep slow charge that enjoys taking its time, if you have a dead battery you need to bring back to life have no fear as this charger with have you back out on the water in no time.

What to think about before purchasing a deep-cycle battery charger

Have you got the right battery?

First things first, if you’re looking for a charger to protect your battery, is your battery worth protecting? Does your battery have enough Ampere-hour rating, marine cranking amps or reserve capacity for your needs? If the answer is yes, then look below for how to best maintain your battery.     If no, think about investing in one of the top deep-cycle batteries on the market that we have reviewed here.

How do I best look after my deep-cycle battery?

The purpose of deep-cycle batteries mean that by nature, they are constructed so that they can provide a gradual amount of power over a long period of time (so that you can use them when you are away from a power source). This makes them ideal for use within recreational vehicles (RVs) as deep-cycle batteries can withstand being deeply discharged.
However, in order to keep your deep-cycle batteries in the best possible condition, it is recommended that you do keep your batteries charged when this power source is available as storing your battery with no charge may cause sulfation and may reduce the battery’s life.
Your deep-cycle battery needs to be treated with care when it comes to recharging and maintaining it, and you need to make sure that the charger you purchase considers the temperature-dependent and battery chemistry-dependent schedule that is essential for charging a deep-cycle battery.
This can get very tricky and technical if you attempt to meet your deep-cycle battery’s needs manually and you might damage your battery if you make a mistake during the charging process. The best option is to let a smart charger manage the unique charging schedule of your deep-cycle battery, so you don’t have to.

What is a ‘smart’ deep-cycle battery charger?

A smart charger will have a microprocessor that is designed to deliver the correct charging schedule for the deep-cycle battery. This means that it will first charge the battery, making sure it is at the optimal charging rate, and then cease charging when the battery has reached capacity, it should then go into ‘float mode’ where the voltage is reduced but is sufficient to maintain the battery. A smart charger will also make sure that your deep-cycle battery is never overcharged.
It does all this safely by checking your batteries voltage in order to discern the type of battery it is charging and how much charge is required.
It is wise to choose a smart charger that also comes with reverse pulse technology, this means that it will maintain the battery at the correct temperature when it is charging. This is important as it means that the battery will be charged at the correct voltage level which is an essential balance required in preventing battery failure when charging deep-cycle batteries.

How many Amps do I need?

Deep-cycle battery chargers come with different amp ratings. You will need to check the NUMBER of amp hours that your deep-cycle battery is able to store so that you can work out the type of charger you are going to need. The number of amps will also determine the speed AT which the battery will charge.
You can work out how long a particular amp charger will take to charge your deep-cycle battery by dividing the amp hour rating by the number of amps the charger has. For example, a deep-cycle battery that holds 100 amp hours would take about 10 hours to charge with a 10 amp charger if the battery was close to flat and you needed it at 100%. If you wanted a quicker charge you would need a battery charger with a higher amp rating.
As will all battery chargers the greater the number of amps, the faster your battery will charge.

What about storing my deep-cycle battery when I’m not using it?

Although it is tempting to forget about your deep-cycle battery after a long day out on your boat or other recreational vehicle it is important to carefully consider the charge levels of your battery before you put it away for storage.
Leaving a deep-cycle battery at a low charge level can damage the battery due to the potential for sulphuric acid to react with the battery plates which are made of lead. So, even if you won’t be using the battery for a while make sure that you charge it fully before storing. A top tip for extending the life of your deep-cycle battery and keeping it at optimum performance.


Deep-cycle batteries are sensitive devices and therefore need to be treated with care.  When storing these batteries you need to make sure they are charged so that they don’t get damaged.
Trying to charge deep-cycle batteries manually can be tricky, and requires much time and effort in order to get the most out of the battery and ensure it lives a long life. If done incorrectly, this method may lead to damaging your battery and potentially reducing its lifespan. If this option is beyond your time constraints and capabilities the best choice is to opt for a smart deep-cycle battery charger.
Smart chargers come with in-built microprocessors which are able to charge your deep-cycle battery in the optimum environment, meaning it won’t overcharge. Using these chargers also means that your battery will work to its maximum productivity and they will also maintain your battery so that it keeps it’s charge when not in use – a technique that will extend its lifespan.
The smart deep-cycle battery chargers discussed in this article are a worthwhile investment for making sure you get the most out of your battery.

1 thought on “Best Deep Cycle Battery Charger (2022 Reviews)”

  1. Question about Schumacher sc 1200 A-CA … you mention “charges and maintains everything from conventional automotive batteries, to deep-cycle and both AGM and gel cell batteries. ” Wondering if it is good for flooded lead acid, deep cycle, 105 ah batteries?
    Also …for schemacher SE 70 MA.. you mention “best for deep cycle AGM”. Which charger would be best for an 80am AGM battery…and why?
    Thank you so very much for all this great information. I can see I need to change some of my ideas about charging batteries.

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