The best AGM battery chargers will be the ideal option to revive your flat battery without relying on professional help. These handy high-tech chargers are extremely beneficial because they offer free maintenance, reliable electricity, and are less vulnerable to vibration.
Therefore, they can recharge your AGM battery consistently and safely. AGM Battery Chargers are available in many types, at various budgets, by different dependable brands, leaving many customers hesitant about which one is the most suitable for them.
We have spent time testing, investigating, and selecting some promising picks on the market with the hope of helping choose the best option. So, let’s get started!
Here is a table that compares the 3 best AGM battery chargers
- Voltage: 12V
- Product Dimensions: 7.52x3.5x1.89 inches
- Weight: 1.76 pounds
- LCD Display: No
- Compatible with many types of vehicles: Yes
- Voltage: 6V / 12V
- Product Dimensions: 4.41x4.48x9.1 inches
- Weight: 0.01 ounces
- LCD Display: No
- Compatible with many types of vehicles: Yes
- Voltage: 12V
- Product Dimensions: 10.91x7.05x4.47 inches
- Weight: 5.23 pounds
- LCD Display: Yes
- Compatible with many types of vehicles: Yes
What are AGM batteries?
The absorbent matt glass battery, also known as AGM battery, is a kind of lead-acid battery. It has been commonly used since the 1980s and is enjoying increasing popularity in recent years.
Manufacturers often use it for a wide range of standout features in automobiles, from motorbikes to bigger-sized vehicles, such as trucks.
The main key to this battery’s popularity is its capability of absorbing sulfuric acid through superfine fiberglass mats, preventing corrosive acid from either leaking or spilling.
That’s why AGM batteries are superior to other battery types on the market to withstand huge shocks and vibrations. As a result, together with their comparatively inexpensive manufacturing process, they are among the top electric batteries for moving objects.
The low self-discharge capacity of only 1% to 3% means they can be stored for long periods without recharging, a lot better than standard batteries.
Some people prefer AGM batteries since these appliances can be flexibly mounted in all positions and are effective on different terrains and weather conditions.
Overall, as we mentioned above, they are maintenance-free, reliable, and less likely to damage.
Unfortunately, nothing is perfect, and AGM batteries are no exception. Like all sealed and capped units, AGM batteries have an enormous drawback: extremely sensitive to overcharging.
This type of battery comes with various charging requirements based on each distinctive design. Therefore, choosing the best battery charger for AGM is, without a doubt, vital as traditional battery chargers will normally overcharge them.
Why does that happen? Although traditional chargers can keep track of how many amps it delivers at the output, there is almost no way to identify whether the battery is fully charged or not. You cannot detect when you should turn off the electric power.
Understanding your concerns, we have tested some top AGM battery chargers that are perfect for your AGM batteries. And under no circumstances, will they harm your batteries.
Now, take a closer look at the best AGM battery charger review below to find the most suitable one for you.
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5 Top-rated AGM battery chargers
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1. NOCO Fully-Automatic Smart Charger GENIUS10 – Best overall
If you search for an all-rounded AGM battery charger, you should not ignore this great option – NOCO GENIUS10. This battery is the follow-up model of the NOCO G7200 and has been upgraded with more advanced features to bring the best user experiences.
Compared to the G7200 version, this battery is 17% smaller in size but offers 115% more power. It can charge batteries effectively, maintain them, drip charge, act as desulfurizing in batteries, and so much more.
This charger is designed to deal with either 6 V or 12 V batteries.
It can handle everything in it whether that is automobiles or marine, deep cycle batteries, including flooded, gel, AGM, or lithium-ion batteries.
In terms of charging, the built-in thermal sensor can easily detect the surrounding environment’s temperature and change the charging speed. Thus, you can prevent overcharging in hot weather or under-charging in colder climates.
The lowest level you can charge is 1 V. If there’s anything the automatic charging can’t handle or you want to have more control, you can charge it manually to 0 V.
If you have a battery that you think is ready for use, try this charger beforehand. It can detect acid stratification, trickle charging, and battery sulfation, extend battery life, recover lost performance, and help your engine start up more powerfully.
Meanwhile, if your car battery has run out, the lawnmower won’t start, or the RV battery is ineffective, consider using this charger, and you won’t be disappointed.
The only problem with this unit is its unclear and hard-to-follow instructions. However, once you get used to it, you will know why it is an impressive candidate for the best AGM smart battery charger.
- Small size but powerful
- Offers exact charging
- Able to charge dead batteries
- Extended battery life
- Compatible with any vehicle
- Unclear instruction manuals
2. Battery Tender Battery Charger 022-0209-BT-WH – Best Compactness
If you want to pick up the best AGM battery charger, why don’t you check out this amazing Battery Tender 022-0209-BT-WH? This 4-amp battery charger might be small, but it is extremely powerful, making it the perfect charger with compactness for carrying around with you. Don’t underestimate this product because of its humble design.
This charger will fully charge your battery before it goes into a floating mode to protect your device, which will maintain the appropriate voltage level without overheating or overcharging. The controls are so simple and compact that you can easily switch from AGM to lithium-ion or be flooded with just a simple touch of a button, providing optimal charging levels for all 6 V and 12 V batteries.
The power coming from this small device is more impressive than you can expect. In general, it is a wise investment when you need to charge your battery on the go.
Keep it in your RV, and you can charge quickly and powerfully when you get stuck outside, delivering reliable engine start-up and extended battery life.
This charger is also ideal for your safety. Not only does it not overcharge or overheat, but the charger and maintenance unit also resist sparks when connected and automatically detect reverse polarity.
These safety measures ensure that you are properly connected and locked before powering the battery.
With a 5-year warranty, this rugged charger is reliable and compact enough to be stored in any vehicle and carried anywhere with you for years to come.
Unfortunately, some users were disappointed with the indicator lights as they blink continuously from red to green. The reason might be unstable power.
- Compact design
- Provides an optimal charge for both 6V and 12V
- Easy to use
- Secure and safe
- Blinking indicator lights
3. Ctek Battery Charger 56-353 – Best For Multiple Uses
In case you are willing to invest a little extra cash for the best-rated AGM battery charger, a promising pick for you is the Ctek 56-353. Although it requires a slightly high initial investment, it will last for years and is completely worth your money.
This product is a wonderful combination of a high-tech charger, maintenance, and reconditioner, creating a huge maximum of 7 A. At that level, it can fit the starter batteries of larger vehicles like trucks and oversized RVs.
Specifically, this system can recharge any AGM battery below 150 AH, even if the battery is almost completely flat.
Ctek’s charger incorporates an innovative automatic charging system with 8 steps into the design, allowing the device to switch between different modes seamlessly for smoother charging.
Users can receive 2 outstanding benefits: you can install it and leave it to extend the battery lifespan up to 3 times compared to other cheaper chargers.
Another plus point for those living in extreme climates is that the system adapts well to all types of weather conditions. Whether the weather is hot or cold, it is still an effective charger in the range of –4 °F to + 122 °F.
Even though it features state-of-the-art functions, the Ctek 56-353 is easy to use thanks to the simple interface with large buttons and intuitive LED display lights for both novice and experienced users.
Dehydration used in reconditioning mode also works better than most competitors, allowing you to extend AGM battery life much longer. All these qualities explain the high costs of modern chargers these days.
It is understandable why almost all customers appreciate this Ctek 56-353 as the best AGM battery trickle charger.
- Works impressively in harsh conditions
- Extends battery longevity
- Works efficiently on up to 150 AH batteries
- Easy to use
- Quite expensive
4. Schumacher Battery Charger SC1281 – Best For Power
In case you do not want to wait for hours to charge your AGM battery, the Schumacher SC1281 is what you need. This battery charger can also work as a jump starter, juicing up your battery straight away without any waiting time.
The jump starter mode is even powerful enough with 100 A to start the engine of SUVs, trucks, or larger batteries at ease. Not to mention its versatility since it can charge various battery types, including AGM, deep-cycle, gel, and standard batteries.
In terms of a battery charger, it features the 30 A quick boost, along with a controlled microprocessor and float-mode monitoring.
All of them allow you to automatically adjust the amperage rate to maintain the optimum battery charge.
Moreover, the charger can maintain the battery level once it is fully charged and continuously resume charging when discharged.
It also has a great advanced feature called a battery and alternator tester in charge of informing you about the charge level and helping diagnose any electrical issue with the battery.
There is a LED display with indicators for better accuracy and a simple start/stop button for usability.
The built-in hook-up protection comes in handy to protect both the battery and the charger from damage because the charger will not work if the clams are reversed.
However, many users find this device too powerful for their vehicles. It may lead to overcharging and damage to your battery over time.
- Work as both a battery charger and a jump starter
- Impressively powerful
- Alternator diagnostic function
- Safe and easy to use
- Compatible with all battery types
- Sometimes overcharge the battery
5. Ampeak 2/10/25A Smart Battery Charger – Best Fully Automatic Battery Charger
This smart battery charger is compatible with all kinds of 12 V lead-acid batteries, no matter of AGM, GEL, or STD.
It is the best AGM battery charger for different battery-powered devices and vehicles, including motorcycles, automobiles, boats, RVs, and even children’s toys.
The start aid button is designed to save energy and activate a battery whose capacity is too low to start the engine in 120 seconds.
It also features an advanced reconditioning mode, reversing the effects of damaged batteries as they are left uncharged for a while.
In this way, their performance and longevity are significantly improved. However, this battery charger is not used to charge dead or frozen batteries.
Apeak Smart Battery Charger is a fully automatic device, thanks to the integrated smart detect system. It can automatically detect the battery’s voltage and capacity, select the best rate, and charge it.
Once the battery is fully charged, the charge cycle functionality automatically switches to float mode. There is also an LCD to keep you informed of all this automatic charging system.
In particular, this battery charger meets the safety protection requirements certified by UL. The Intelligent Temperature Protection System allows it to start and operate normally between -4 °F and 104 °F.
Besides, there is a Smart MCU Controlled Program to monitor and improve the charging cycle time over time.
That is why you do not need to worry about overheating, overvoltage, overtime charging, or reverse polarity. So far, most customers are satisfied with this AGM battery charger’s performance and quality, and no shortcomings have been reported.
- Fast charging
- Suitable for any machines and vehicles
- Energy-saving and powerful
- Reconditioning function
- Features fully automatic system
- Safety guaranteed and certified
An AGM battery charger does not cost you an arm and a leg, but it is not cheap either. If you plan to buy one, you had better get some background knowledge on the battery charger or consider the following points to get the best AGM battery chargers.
Budget is always one of the first and foremost considerations before buying anything.
There is no point in wasting your money on a high-end machine when a cheaper option can meet all your demands. The price cannot tell anything about the quality, performance, longevity, etc.
If you intend to charge your big machines, such as a boat or an RV with an AGM battery charger frequently, it’s better to purchase an expensive charger. It is more likely to be cost-worthy in the long run. Otherwise, an affordable charger is good enough for occasional use.
There are 3 different types of AGM battery chargers on the market: chargers, maintainers, and reconditioners. All of them are built to do what the names imply.
Chargers are the most common types and are designed to recharge and resurrect an AGM battery. However, it must run on a specific level of voltage and amperage to work efficiently and safely.
Maintainers keep the current level of the charge stable, preventing an AGM battery from discharging and damaging its system after not being used for a while.
Meanwhile, reconditioners, or restorers, are used to restore a poorly performing AGM battery. They use a high-tech system to get rid of contaminants and blockages and enhance overall performance.
Even though some battery chargers can work as a combination of 2 or 3 types, it is important to know what charger types you need.
There are currently smart battery chargers available, which can both charge and maintain your battery. They can detect the optimal charging mode and automatically turn it into float mode to protect your battery from overcharging.
They can also repair your battery simultaneously by removing all the sulfate building up on the plates to extend the battery’s power and life.
3. Capacity and voltage
The voltage of an AGM battery is usually 6 V or 12 V, and some may be 24 V. Larger batteries, such as those for boats may require a higher voltage.
Because low and high-capacity batteries use different battery chargers, you must consider your battery’s capacity and voltage before buying a battery charger.
There is no correct voltage for the AGM battery charger, depending on your demands and device. Chargers for 12 V batteries can charge high-capacity batteries more efficiently.
However, the best charging voltage may range from 13.6 V to 13.8 V for standby use and 14.6 V to 14.8 V for deep cycle use.
Therefore, you must be sure that your charger is compatible with the battery’s voltage because the charger will not work unless it runs on the correct voltage level.
4. Discharge rating
The discharge rating, generally called amps (A), is an important factor you need to bear in mind. It measures the amount of current a battery can provide in an hour and must be suitable for your machines or vehicles.
In case you have no idea about this topic, look for information in the device’s manual or any sticker on your battery.
Or else, you should directly contact the manufacturer for more recommendations and advice. This step is extremely crucial as, like with the voltage level, the charger cannot work with the wrong discharge rate.
The battery charger’s discharge rate also helps you determine the total hours to charge your battery fully.
To roughly estimate, divide the amp hours of the battery by the discharge rate of the charger. It’s advisable to add 10% and round up to have a more accurate number.
When referring to safety, it is not only for your battery but also for you. There are dangerous possibilities to charging your battery with a poorly made charger, including battery overcharge, damage, electric shock, or worse, explosion.
Some chargers come with an automatic discharge function that shuts off when the battery reaches a certain amount or is fully charged. In this case, the possibility of using too much power or overcharging the battery is avoided.
To prevent all of these, we recommend you purchase a high-quality battery charger from well-known manufacturers whose safety requirements are well-assured and certified.
After all, why risk your life with an off-brand or badly designed battery charger?
Though you might think of buying a battery charger for one specific machine, consider whether it can also work with other devices or not. For example, some AGM battery chargers are suitable for all battery-powered mobile machines and cars.
Moreover, the best AGM battery chargers usually feature additional features, such as maintaining and protecting the battery from reverse polarity. In other words, they can work as a charger, a maintainer, and a reconditioner simultaneously.
Frequently Asked Questions
1. Can an AGM battery charger save my dead battery?
Yes, you can charge a dead battery with an AGM-specific charger. Nevertheless, depending on how long it has been discharged, it may require distinct processes to rescue a dead battery.
The latest charging technology in these battery chargers can be useful to bring back almost any dead battery. And when it is charged, the best AGM smart battery charger also helps optimize and maintain the battery’s best working condition.
2. Do AGM batteries need specific chargers?
Absolutely. As an AGM battery requires a low and slow charge, it needs a special charger to take specific charging information. Most AGM battery chargers have microprocessors that can check the battery state and adjust the voltage and current to fit that state.
A standard charger cannot do that but can easily overcharge and damage an AGM battery. In the worst situation, it can kill the battery.
Hence, we suggest using a specifically designed AGM battery charger for your AGM battery to protect it better and preserve its performance and longevity.
3. How often should I charge my AGM batteries?
Most of the AGM batteries in vehicles do not require regular charging.
That’s because the alternator in cars can transfer power from the pumping pistons in the engine to charge the battery when you drive. But it would help if you still charge your battery when it is running low.
While regular batteries need a charge every 6 months to avoid sulfation, AGM batteries are less vulnerable and can be discharged for a longer time.
However, you had better not discharge them more than 50% to prevent permanent damage.
The Bottom Line
If you have ever had a flat battery and had to wait hours for help, an AGM battery charger is your lifesaver. This device can immediately recharge your AGM batteries and is compatible with vehicles and any battery-running machine.
And NOCO GENIUS10 is one of the best AGM battery chargers that meet all the basic requirements at an affordable price.
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