If you want to use a deep cycle battery, then you will also need a TOP quality charger for it too. Deep-cycle batteries are often found in appliances that require the gradual release of power over a long period of time when there is no other power source. They can charge a battery as fast as possible, some of them can manage a level of charging a battery.
We created this article of the best deep cycle battery chargers that money can buy. Find out which device will fit your needs perfectly.
Deep Cycle Battery Charger Reviews
Best deep cycle battery chargers
Charging deep cycle batteries from our TOP is the best among those you can find on the market. The list consists of 8 positions, each review provides all the necessary details about their specifics. Also, you can find a buying guide with the most frequently asked questions below.
CTEK (56-864) MUS4.3: give new life to your engine battery
CTEK produced the best fully automatic battery chargers for automotive or small engine starter batteries on the market. They are completely silent, unlike old-fashioned type chargers which have a big fan. The chargers come with a ring terminal connector pigtail, and an alligator clamp pigtail, with a nice quick disconnect in the output line. You can leave one permanently installed on a battery for deep cycle battery charging, and use the alligator clamp for charging another equipment. This charger will not work if the battery has less than 2-volts DC.
- Works excellent on BMW’s and Chevy’s.
- Very reliable (even though power cuts, picks up from where it left off once the power returns).
- Supports AGM batteries and regular batteries.
- No venting or fan to help with the heat.
- Could have a longer clamp wire.
- A little slow.
BLACK+DECKER 20V: a smart system for recognition
A must-have addition to charging your 20V MAX batteries. This cuts down the time of charging significantly, and the indicator light shows when charging is done. It’s easy to use and doesn’t take a lot of space, and if you have multiple batteries you’ll never need to worry about running out of juice. It works much faster than the standard re-charger supplied with their tools/batteries. The 45 minutes on a dead battery vs. hours on the standard recharger.
All depends on what size battery you are charging. The only thing that could annoy someone that it doesn’t have screw head holes on the back. So you have to charge your batteries on a flat surface only.
- Cost-effective solution.
- Size efficiency.
- Long lasting.
- Take too long to charge fully (over an hour on the charger).
Battery Tender Plus 021-0128: compact charger with all the best facilities
The best things about the Battery Tender are that it is very durable. It can stay connected without overcharging or decreasing the battery’s life and it can be used with the battery connected to or removed from the motor. An ability of the device to maintain the battery condition for any situation when the battery isn’t used is really essential. So when you going somewhere for long periods of time, you can connect this deep cycle battery tender and you’ll have no worries when you return. The battery will be fully charged and your car will be ready to go.
- Simple and easy to use connections that look like mini jumper cables.
- Stays connected without overcharging or decreasing the battery’s life.
- Doesn’t allow mixing cables with other brands. In this case, the red indicator is always turned on telling you about the mistake.
NOCO Genius G4 6V/12V 4.4 Amp: an easy way to charge your battery
If you have a motorcycle, I highly recommend this 12V deep cycle battery charger G4. The $30 G4 will fit the bill for your needs (this also works for lawn-mower batteries and other smaller batteries). The battery will slowly lose charge from the 13.5V down to 12.78V and then the charger will bring it up to 12.79V. Then it will drift down to 12.78 and charge back up to 12.79 and will do this continually. This battery charger is great because you can leave your car in the garage indefinitely and it will keep the charge up. If there’s a power outage, when the power comes back on the charger starts in the same mode it was on and brings the voltage up to that 13.5 volts.)
- It’s sleek, but it’s entirely functional.
- You can charge up to 4 batteries at once.
- The charger is always monitoring the battery, so it’s impossible to overcharge it.
- It won’t recharge a dead battery in a larger vehicle.
BatteryMinder 128CEC1: state-of-art technology and reasonable price
Excellent battery charger/maintainer at a great price ($135). Includes a Temp Sensor that isn’t inside the unit (which can be fouled up by the device getting warm), uses plugs, is always desolating when there is a charge (awesome feature – others only do it when you set them to that mode), and can charge regular, gel and AGM batteries. The BatteryMinder may not look like the fanciest battery charger, but it definitely gives every other one out there a run for their money.
- It is small and compact, making it an ideal companion on the go.
- Low amp charging means your battery will last longer.
- It is not recommended for 12V aircraft batteries.
Schumacher SC1319: Fully automatic battery maintainer
Schumacher’s company sells many different models of the 1.5 amp chargers but they all function basically the same. There are no buttons or switches, you just connect to the battery and plug it in. The safety feature consists of the charger automatically turning off once the charger reads 100% battery charge. They have versatile options for quick connections and the cords are fairly long and they also sell an even longer extension for the power connection if you need it. The small size and light weight charger work great for wall mounting and quick connection to a battery. This work very well for any battery that isn’t used on a daily basis. You can leave them continuously hooked up with no risk of overcharging. It is a very cost-effective option to keep your battery charged up and ready to go.
- This charger is DOE compliant and comes together with the standard battery clamp and ring connector.
- It features a microprocessor control which automatically switches to float mode.
- The battery doesn’t indicate the green light when it fully charged.
- It will not let you charge at 30 amps when the battery gets ½ charged.
Best deep cycle marine battery charger
Deep cycle marine batteries are designed for a continuous discharge current of 5-50 amps, withstand discharge within a few hours or even days and discharged to 80% of capacity. The IP indicator shows the protection of an object from solid objects and liquids. These two products, which represented below have excellent protection against liquids and are excellent for a marine battery.
ChargePro 2711A (IP65): multi-stage smart charging
Water-resistant, sealed unit, can be used outdoors and left running outdoors. They are not “fast chargers” and won’t cook your battery. This deep cycle battery charger provides a nice float-charge and can be left on the battery indefinitely. As well, these battery chargers are simply a dependable product that also extends battery life. You can trust this charger to take good care of your battery on or off the vehicle for years to serve.
- ChargePro is up to 40% lighter while increasing durability and ease of installation.
- Total waterproofing.
- Consistent overcharging is fatal to Gel and AGM batteries.
NOCO Genius G3500 (IP67): a good option for your marine battery
Perfect charger for anyone, who has a lot of batteries. Very multifunctional, NOCO Genius will charge any battery you have. I like this option for setting up a ‘battery charging station’. This battery has a water-resistant and durable cabinet. Besides, two additional mounting holes fix the device and help avoid mechanical damages. This trickle charger fits both cars and motorcycles. It is easy to use and has a safety built-in to avoid overcharging and damaging your battery. The light indicator shows you the battery level.
- When the battery is completely charged, the device switches to the “maintain” mode automatically.
- There is a 5-year warranty.
- It comes with a special intuitive diagnostic tool that provides a visual interface which can help you understand battery problems like reverse polarity and low-voltage.
- Radio-frequency noise problem – you can hear it cycles while listening to an AM radio.
- It’s better to apply to non-AGM batteries like lead-acid and lithium-ion batteries.
Why would you need a deep cycle battery charger?
Discharge to zero leads to irreversible sulfation and a significant loss of capacity of any lead battery, regardless of its type. If you leave your battery connected to the positive terminal and it will be discharged to zero, you will not have to utilize it but use a deep cycle battery charger. With reference to solar power stations, this situation can happen if the charge controller is left for the winter, and the solar panels are covered with snow. This will lead to the fact that in the absence of solar charging, the controller’s own consumption will slowly lead to a complete discharge of the battery.
Tips for charging deep cycle batteries
Charging of a deep cycle battery is different from charging starting or car batteries. To charge a 12-volt battery, the charger must provide a voltage of at least 14 volts. However, if the voltage exceeds 15 volts, the battery will overheat, the gas formation will begin, gas evaporation, and plate deformation will begin. Gel batteries are most sensitive to increased voltage, so they are recommended to charge in the range of 13.8 – 14.4 volts.
24-volt lithium-ion batteries are charged at a voltage of 29.2 volts, and 12-volt batteries – 14.6 volts. Voltage supporting a charge of 26.5 V and 13.25 volts.
How to look after a deep cycle battery?
After several months of storage, the voltage may be reduced due to self-discharge. When the voltage drops below 12.6 volts, lead plates begin to sulfate, which can lead to a decrease in battery capacity. It is recommended to check the battery voltage once every six months and not allowed to drop the voltage below 12.6V, and if this level already reached, you should recharge the battery from the battery charger or using solar batteries. Implementation of this recommendation will significantly extend the life of the lead-acid battery.
Can I use a deep cycle battery charger on a regular battery?
Usually, there is no problem when you are using a deep-discharge battery instead of a starter battery – you just need to pick up the cell so that it provides enough amps for the starter. As a rule, if you want to use a deep cycling battery as a starter battery, you need to take it about 20% more powerful than a regular starter cell.
Can I charge a deep cycle battery with a regular charger?
Charging the AGM battery with a normal charger is possible only in charging mode from 75% to 100% level (12.45V). Batteries, that are deeply discharged, can be recovered only by using automatic chargers. We recommend you to purchase models with intelligent control and onboard three-stage charging.