If you own a vehicle, a lawn mower, a boat, or anything that has a battery connected to start the engine then you know how important it is to have a battery charger. A dead battery can ruin all of your plans and often cost you time and money.
If you have deep cycle batteries you also know that not all chargers can provide a charge to that type of battery. The best deep cycle battery charger is capable of charging the battery, maintaining a charge on stored batteries, and providing safety from battery damage due to overcharging.
The following reviews were written to help you select the right battery charger for the type of battery you have.
Best Deep Cycle Battery Charger 2021 Reviews
NOCO Genius G4 6V/12V 4.4 Amp 4-Bank Advanced Battery Trickle Charger Maintainer
This battery charger is ideally suited for maintain batteries on vehicles, boats and equipment that are often unused for months at a time. It can maintain or charge batteries on lawn and garden equipment, motorcycles and sports utility vehicles, cars and trucks and boats and watercraft.
The NOCO Genius G4 has the ability to charge four batteries at one time. Yo can connect four different batteries and allow them to charge and be maintained without having to wait for one battery to charge.
This unit will charge all types of six and twelve volt batteries. It is capable of charging lead acid batteries, and WET batteries as well as AGM and Gel batteries. All of your equipment can have a hot and ready battery all of the time using this one simple unit.
This is a worry free product. The technology used to design this unit is so advanced that all you have to do is connect the battery you want to be charged and then forget it until you want to use the battery. The device will monitor the battery and keep it charged to maximum power without over charging or damaging the battery.
The safety features include anti spark technology and reverse polarity recognition so you know that your batteries are safe even if you accidentally get your wires crossed during connection.
Optima Digital 1200 12V Performance Battery Charger and Maintainer
This unique battery charger has the ability to charge batteries that the majority of other battery charges cannot charge. It can provide a perfect charge to a 1.25 volt battery. It also charges and provides maintenance charges to AGM and flooded 12 volt batteries.
You can even use this device to charge your smart phones, tablets and electronic devices using the USB charging port. When you are away from home you will not have to worry about losing battery power or losing the ability to communicate with your phone.
It provides as much as twice the output of the standard battery charger so it will charge your batteries in about half the amount of time. It has an LCD charging gauge to show you what the status of your battery is. It also has non-slip grips and an LED work light for your convenience.
Once your battery is connected to the charger it will provide fault messages to alert you to the condition of the battery, and any possible problems. It has reverse polarity safety technology that will not allow it to work if the battery is connected improperly.
It comes with a cable that is designed to be connected to batteries on equipment that is kept stored and seldom used. It will not over charge the battery or cause any damage to stored vehicle batteries.
CTEK (56-864) MUS4.3 12 Volt Fully Automatic 8 Step Battery Charger
Using the CTEK 56-864 will increase the life of your battery and allow your battery to give you peak performance. It both charges and maintains batteries that may have to sit for several months between uses.
It is designed to be both waterproof and dustproof so it works no matter what climate you are in. The high humidity and high dust levels of different areas will not affect how this unit works.
This is an all-around charging system that comes complete with numerous accessories so it is possible to connect it to many different types and styles of batteries. With this charging system you can keep all of your batteries at top working charge.
It has the reverse polarity safety feature installed so you are not going to accidentally cross any wires and damage the battery you are connecting to it. It has anti spark technology so you do not have to worry about inadvertently creating a fire hazard when connecting the device.
The unit evaluates the batteries you connect to it to determine if the battery is healthy enough to receive and hold a charge. It also has a patented technology that allows it to repair batteries with a sulfate build up by removing the excess build up from the plates of the battery.
Schumacher SC1319 1.5A 6V/12V 12Fully Automatic Battery Maintainer
The Schumacher SC1319 is the perfect battery charger and maintainer for all lead acid batteries. This unit will provide a complete charge to a lead acid battery and if you leave the battery connected to the charger it will maintain the charge using float technology rather than trickle charge technology. Float technology allows the charger to provide a charge when needed but stop providing a charge when the battery is at full capacity so the battery is not damaged from an over-charge.
The charger automatically detects whether the battery connected to it is a six volt or a twelve volt so you do not have to worry about over voltage situations. You can call it a mistake proof charging system.
The reverse polarity technology has been applied to this unit so you never have to worry about crossing wires and creating a spark or damaging the battery. This technology is going to save a lot of batteries from internal damage.
This charger is designed with multi charging stages. It evaluates the battery and starts to charge it according to how much of a charge the battery needs. The life of your battery is extended when you use this charger because it does not overload the battery.
Battery Tender 022-0158-1 Waterproof 24 Volt Power Tender Plus Battery Charger
This vibration resistant battery charger is fully mountable and waterproof so you can take it with you and have it handy. Your battery charger does not do you any good if it is not with you when you need it. This unit is small and light weight so it goes with you easily, and with it being fully mountable you can be sure that you will not misplace it.
This is a small charging system that is capable of charging flooded and sealed batteries, maintenance free batteries, AGM batteries, as well as lead acid batteries.
That means that you will have a charger that is able to take care of all of your equipment, no matter what battery powers it. You will have the charging power that you need, and the peace of mind that the charger you are using is safe for your batteries.
We know that trickle chargers can damage batteries over time. This unit does not provide a trickle charge but provides a float charge. That means that the charger senses when the battery needs more charging and automatically switches on to provide that charge, and then switches off when the battery is fully charged. This eliminates the damages from overcharging.
The Battery Tender 022-0158-1 has Infinite Sequential Monitoring technology so it constantly adapts to what the battery needs so that it provides the maximum charge in the safest manner.
The unit has the latest anti-spark and reverse polarity safety features so you do not have to worry about accidentally connecting the cables wrong and damaging your battery, or worse.
ProMariner 43021, 20 Amp, 12/24/36 Volt, 3 Bank Battery Charger
The ProMariner 43021 ProSport 20+ Generation 3 has three charging ports to connect your batteries to. The technology used to design this battery charger allows it to share the charge it is producing amongst several batteries so you do not have to wait for one battery to reach a full charge before you connect another battery to the unit.
The charger has the ability to detect faults in the batteries that you connect to it. This means that it can alert you to a battery that has a potential problem. The indicator will show you what bank the ‘sick’ battery is connected to.
It has the ability to recondition batteries connected to it so it increases the battery life. If you leave batteries connected to it so they will maintain a full charge the unit will do a monthly evaluation on the batteries and will recondition any batteries that are in need of reconditioning.
You can take this charger with you anywhere because of its waterproof design. It is safe on your boat and it has safety features to prevent overload, or over voltage, reverse polarity or even over temperature complications. You can feel safer using the charging unit and know that the batteries you connect to it are not being damaged.
Schumacher SC1393 12A 6/12V Battery Charger
This is a worry free battery charger. It automatically detects the voltage of the battery and has a microprocessor that adjusts the amperage rate so that the battery being charged receives the optimum charge.
It has a reverse polarity safety feature that prevents the charger from operating if the negative clamp is connected to the positive post of your battery. This protects you from possible battery damage or from sparks that could result in damages.
It is possible to charge standard, AGM and deep cell batteries using the Schumaker SC1393 charger.
If you leave the battery connected to the charger the float mode of the unit will detect when the battery loses any of its charge and will make sure that your battery stays hot and ready to go. This is especially handy for batteries that power boats and equipment that you do not get to use frequently.
The entire charging unit weighs less than four pounds so it is easily moved to be connected to any of the batteries you own. The light weight and small size also make it easy for you to carry this charging system with you when you travel so you can always maintain your batteries.
LST 12V 5A Automatic Battery Charger Maintainer
This battery charger has seven different battery charging stages. It begins with the desulfation stage, then goes to the soft start stage, then the bulk charge stage, then the absorption stage, on to the test mode stage, then the reconditioning stage, then finally it goes into the float stage where it maintains the charge that the battery has obtained.
There is an LED indicator light that will visually display the stage of charging the battery is in and let you know diagnostic information concerning the battery.
The unit is water and dust resistant so it is not damaged by being used outdoors. It comes with four DC adapters and the manufacturer provides a lifetime quality warranty as well as a 60 no questions asked refund/return policy.
Your safety during use of this product is guaranteed by the reverse polarity features that stop sparking and damage to your battery. It also has safety features that will protect you from a short circuit, and a power overload.
All of these features are installed in a lightweight charger that is easily moved from place to place so you can use it to charge the batteries on any of your equipment including your lawn mower, your boat, your watercraft, your ATV, or your vehicle. This is a recommended battery charger for a motorcycle.
Schumacher SSC-1500A-C Charger with Battery Clamps
This is a battery charger that will test your battery to determine the condition of the battery. You will be alerted if you have connected a battery that is faulty in anyway. There is a digital meter that displays the results of the testing and also displays the status of the battery that is charging so you always know when your battery has reached a full charge capacity.
Schumacher SSC features electric push-button controls so it is very easy for you to select the charging mode that you desire.
It is capable of providing a 15 amp fast charge, a 10 amp fast charge, or a 2 amp slow charge that is optimum on smaller batteries that power motorcycles, lawn mowers, and smaller engines.
Over charging of a battery is a thing of the past when you use this charging system. The charger can evaluate the charging needs of the battery and automatically make adjustments to that the battery receives a full charge but no more than a full charge. This feature prolongs the life of the batteries it charges.
The case to this battery charger is designed with a retractable handle so it is easy for you to carry it to another location.
Picking the Right Deep Cycle Marine Battery Charger
Picking the right deep cycle marine battery charger is crucial to you having the tool you need to maintain the batteries you own. There are many different features on these charging systems that make them better choices according to how you will be using the device.
The majority of the newer battery chargers have increased safety features due to the latest technology and developments. You want a charging system that has the following safety features.
Waterproof and Dust Proof
Most marine batteries are deep cell batteries so it makes perfect sense to have a battery charger that can be exposed to high humidity, or some moisture. If you are using the charger on an item that is often exposed to dust like the dust from traveling a dirt road down to the boat launch you want to make sure that the dust is not going to stop your charging system from operating properly.
If you have multiple devices that have batteries of differing voltages then you want to choose a charger that is capable of charging multiple voltages. Many chargers can charge 6 volt or 12 volt and some chargers can even charge 6 volt, 12 volt or 24 volt batteries.
Multiple Connectors or Charging Banks
If you have several batteries that you would like to keep a maintenance charge on then you want to buy a charger that is capable of charging multiple batteries at the same time. You can buy chargers that are designed to charge three or more batteries at one time and provide all of the batteries with the optimum charges. You can use them as your car battery chargers also.
Chargers that Recondition Batteries
Many of the battery chargers are now capable of evaluating your battery for a sulfate build up on its plates and performing a reconditioning that reduces that sulfate and extends the life of your battery. Lead acid batteries are the most prone to developing sulfate build up.
Many chargers also evaluate battery health and will let you know if the battery you have connected is no longer healthy enough to receive and maintain a charge.
Ability to Charge Other Items
The majority of people have cell phones, tablets or digital cameras with them most of the time. Some chargers have USB ports that allow you to charge those electronic devices while you are away from home.
When you are selecting a battery charger you must consider what types of batteries you need to charge, and how they need to be charged.
Deep Cycle Battery Size Guide
Batteries that are meant to be used on cars, trucks, and large motors on boats, etc. are often referred to in a ‘group size’. The group size tells you which battery is the most appropriate for the location it will be in, and the physical dimensions of the battery and case.
For deep cycle batteries that are meant to be used on boats and large water craft the group size is usually a reference to the physical size of the battery. The larger the battery is then the larger the group size of the battery is. Batteries are measured by their length, their width and their height, so make certain that you know where the battery will be placed and what dimensions are available for the battery in that compartment. The dimensions of a battery are determined by measuring the battery at the widest point. Most batteries are longer and wider at the top and they gradually decrease in size down the sides and to the bottom.
If the group size of a battery has an M in the name of the group then you can be sure that the battery is designed for marine or ATV usage. Marine batteries and automotive batteries can both be deep cycle but they have different construction so they are not readily interchangeable.
Do not confuse the cold cranking amps that are displayed on a battery with the size of the battery. The cold cranking amps describes how many amps are provided for cranking your engine when you initially turn the key and does not describe the physical size of the battery.
The Battery Council International (BCI) delegates numbers and letters to batteries to indicate what group size the battery fits in according to the size of the battery, the terminal location, and the battery type. Some vehicles can accommodate a battery from more than one group size so you should always consult a buying guide before you purchase a battery that has a group size different than the one listed on the battery you are replacing.
A battery charger is a handy tool for anyone that owns a vehicle, boat or lawn equipment. Finding the best deep cycle battery charger will require you to evaluate the battery you need according to the equipment you have, and then determine how you will use the charger. There are portable chargers and there are chargers designed to maintain several batteries at one time.
Pay close attention to the features offered by the different chargers when you are making a comparison. You want a charger that will work on the type and size of batteries that you use around your home and during your recreation time.
The right charger will maintain your battery and improve the longevity of your battery as well.