10 Best AGM Battery Chargers in 2021

If your car has been sitting out in your garage for the longest time, chances are, the battery has already died. And the only way to revive it is through a battery charger. Not just that, but if you own any AGM batteries, for that matter, you are sure to need a suitable AGM battery charger at some point. This is why we bring you our list of the 10 best AGM battery chargers. 

Each of these products is meant for charging and also maintaining a wide range of batteries. Hence, you can go through the reviews and pick the one that works best for you!

Are you in a rush? Why not have a look at our Top Picks:

Disclaimer – This article may contain affiliate links, this means that at no cost to you, we may receive a small commission for qualifying purchases.

1. NOCO Genius5 5-amp 12V Battery Charger

With an impressive 4.7/5 rating on Amazon, the NOCO Genius5 5 amp 12V Battery Charger has found its place in several homes. And next could be yours! With a mid-range price tag, the NOCO battery offers some excellent features which you cannot deny. In fact, NOCO’s Genius battery series has some amazing products, and this particular model is no exception.

For one, it has multiple applications as it not only acts as a battery charger but a maintainer, trickle charger, and desulfator. This charger is compatible with nearly all 6-volt and 12-volt batteries, including AGM, lithium-ion, gel, marine, and flooded batteries.

The charger will precisely charge your batteries, even batteries as low as 1V. What we liked most about this charger is its automatic temperature control. It automatically adjusts the charging rate depending on the exterior temperature. This enhances its durability and ensures that it will last for years to come!

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Pros:

• Suitable for small as well as large vehicles
• Compact and portable
• Lightweight
• Works as a charger, re-conditioner, and maintainer
• Automatic temperature control

2. Battery Tender 021-0123 Junior Charger and Maintainer

The Battery Tender 021-0123 Junior Charger and Maintainer is one of the top-rated chargers on Amazon. It has a solid 4.8/5 rating with more than 27,000 reviews. No doubt, why it has made it to our list as well!

This unit from Battery Tender excels in almost all aspects – performance, convenience, and affordability. With a size of just 11x4x11 inches, it is also highly compact, portable, and lightweight. 

This charger is suitable with a wide range of 12-volt batteries, including maintenance-free, AGM, lead-acid, gel cell, and even flooded batteries. It features a smart four-step charging method, which means you don’t have to worry about overcharging issues. Another impressive feature is its automatic switch, which turns on the float mode right after it charges the battery fully.

Other great features include reverse polarity protection, spark-proof connections, and a 12-foot external cord.

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Pros:

• Automatic charging 
• Easy to use
• Portable and lightweight
• Very affordable
• Available in several volt variants

Cons:

• It is only meant for PowerSports batteries.

3. CTEK 56-353 Multi US 7002 12V Battery Charger

For our premium pick, we have the CTEK 56-353 Multi US 7002 12V Battery Charger. If you don’t mind spending a little extra cash on a powerful and super-durable AGM battery charger, this unit won’t disappoint you!

This charger acts as a re-conditioner and maintainer as well. It pumps out a maximum amp of up to 7A. Thus, it is suitable for charging all kinds of AGM batteries as long as they are under 150AH. Regardless of whether the battery is half-drained or completely flat, the CTEK 56-353 battery charger has your back!

This beast features an automatic eight-step charging system, which promotes smooth charging and prevents overcharging issues. The battery can also withstand harsh weather conditions and will work equally well in extreme temperatures ranging from +122°F up to -4°F.

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Pros:

• Suitable for bigger batteries up to 150AH
• Works well in extreme weather conditions
• Improves battery life
• Ease of use

Cons:

• Expensive

4. BMK 12V 5A Smart Battery Charger

The BMK 12V 5A Smart Battery Charger is another reasonably-priced unit that offers a 2-in-1 function. It acts as a charger as well as a maintainer. The entire construction of the charger is made from a heavy-duty plastic material. Hence, it is resistant to early wear and tear and will last for years to come.

You can charge a wide variety of batteries with this unit, ranging between 15 and 100 Ah. The BMK 12V 5A variant will charge your batteries in four stages. Once it completes the charging process, the unit will automatically shut down. Additionally, it also features an LED indicator to keep you updated on the charging status.

As far as safety is concerned, the charger will flash the fault light in case it detects any defective batteries. It also has a 72-hour safety feature and spark-proof connectors.

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Pros:

• Portable
• Mid-price range
• Suitable with a wide range of batteries
• Rugged construction
• Durable
• Packed with safety features

Cons:

• Charger tends to get warm.

5. NOCO Genius2 2-Amp Battery Charger

Next up, we have another excellent product from the NOCO Genius series. With this variant, you can expect all the goodness of the Genius5 model, but at a lower amp version. Due to this, this version is relatively lower in price.

The NOCO Genius2 model is much lighter and compact and an ideal pick for those people who don’t need excessive power. If a 2A power charger suits your needs, we are confident that you won’t regret buying this product.

Regardless of sharing some similar benefits with the Genius5 unit, there are some significant differences as well. The Genius2 can work in any weather conditions, thanks to its inbuilt thermal sensors.

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Pros:

• Compact and portable
• Affordable
• Acts as re-conditioner, charger, and maintainer
• Can charge batteries as low as 1V
• Temperature control
• Precise charging

Cons:

• Not suitable for 40+ Ah batteries

6. Optima Digital 400 12V Performance Maintainer Battery Charger

The Optima Digital 400 12V Performance Maintainer Battery Charger will not only charge your batteries efficiently but will also improve the battery life. It features an inbuilt battery health mode that aims at maximizing battery performance.

Though it comes with a pretty hefty price tag, its features are worth considering. It pumps out a power of up to 4-amp, which means it can revive nearly any AGM battery. Though it is compact and lightweight, the Optima Digital 400 12V is a powerful product for both home and professional use.

And the cherry on top is its three-year warranty. Just make sure to keep your original receipts in place, and the company has got your back!

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Pros:

• Can charge dead batteries as low as 1.25V
• Compact yet powerful
• Works as a maintainer as well
• Features an inbuilt health mode
• LCD display

Cons:

• Expensive 

7. ProMariner 43021 Battery Charger

Here is a super-powerful battery charger for all the sailors out there! ProMariner is one of the leading brands in the market of turbo-powered battery chargers and other related products. It has been manufacturing some of the most advanced and powerful chargers for the last three decades. And their ProMariner 43021 Battery Charger is a perfect example of their excellence and decades of expertise.

Specially designed to charge batteries onboard, the ProMariner 43021 is an all-rounder with fast-charging features and energy-saving mode. It can fully charge most batteries within 8-10 hours, whereas other similar products may take double the time or even more.

Like most other quality AGM battery chargers, this model also features an automatic multi-stage charging function. This means your battery will last you longer and better. It pumps out a power of up to 20-amp and comes with a two-year warranty in case of any malfunction.

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Pros:

• One of the high-quality marine battery chargers out there
• Powerful 20-amp
• Efficient charging
• Multi-stage charging
• Fast charging

Cons:

• Expensive
• May overheat sometimes

8. Schumacher SC1281 Fully Automatic Smart Battery Charger

The Schumacher SC1281 model is a fully automatic battery charger. This product also comes in handy during an emergency situation when you need to boost your car battery for a quick spin around the block. The Schumacher SC1281 charger hence acts as a jump starter.

As a jump starter charger, this unit pumps out a power of up to 100-amp that is more than enough to kick start your car engine whenever required. And the best thing is, this beast of a charger will even boost bigger car models like pick-up trucks in an instant.

What we liked most about this model is its diagnostic function that detects any electrical issues in your AGM batteries. However, if you are a novice, we advise you to seek help from professionals to learn more about this function.

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Pros:

• Works as a jump-start charger
• Suitable for charging small as well as big cars
• Features an inbuilt diagnostic function
• Fast charging
• Powerful

Cons:

• Does not include re-conditioner or maintainer functions
• Diagnostic function is not beginner-friendly

9. Foval Automatic Trickle Battery Charger

For those of you who want more affordable options, you can check out the Foval Automatic Trickle Battery Charger. At an affordable price, this is one of the most versatile battery chargers out there. It can charge a wide range of batteries, including flooded, AGM, lead-acid, and sealed batteries.

Not only for charging, but you can also use it as a maintainer to keep your ATVs, boats, cars, and motorcycles in check. Since it is fully automatic, you can just connect it to your AGM battery and leave it as it is. Once it completely charges the battery, it will automatically stop charging and slip into the float mode.

Backed with a two-year warranty, the charger also comes with an overheat protection feature and an 8-foot output cord.

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Pros:

• Charges a wide range of batteries
• Affordable price
• Fully-automatic
• Automatically stops charging once the battery is full.
• LED indicators
• Overheat protection

Cons:

• Clamps are not of the best quality.

10. DieHard DH137 Battery Charger

Here is another 2-in-1 battery charger that acts as a maintainer as well. With this unit, you can charge even a flat battery or maintain a fully-charged one. Though it is pricey, The DieHard DH137 is highly reliable and efficient.

Similar to other quality chargers, this model also features an automatic multi-charge system, which prevents over-charging issues and promotes precise charging.

With LED indication and a simple button operation design, this battery charger is also very simple to operate. Hence, even if you are a novice, you can easily crack the code!

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Pros:

• Can charge gel and AGM batteries
• Multi-stage charging
• Works as a maintainer as well
• Compact and lightweight
• User-friendly

Cons:

• Not a quick charger

AGM Battery Chargers Buyer’s Guide:

There are several options out there when it comes to AGM batteries. Thus, it is normal for anyone to get confused as to which one to go for. But worry not! We’ve got your back! Here is a brief buyer’s guide for you that will shed some light on what you should look for in a reliable AGM battery charger.

Safety:

The most important thing you should consider while buying a battery charger, or any electronics for that matter, is safety. Hence, make sure to check if the battery charger is reliable and safe for use. You can also find various safety features in most quality chargers like multi-stage charging, automatic float mode, electrical issue detection sensors, etc. These are some features you can consider.

Durability:

AGM battery chargers usually come at a high price. Hence, you wouldn’t want to invest in something that won’t last you for long. However, it wouldn’t be so difficult for you to come across a sturdy and durable AGM battery charger as almost all quality chargers don’t compromise in their construction. In fact, all the above-reviewed products are rugged and made of high-quality materials. Thus, you can rest assured, pick any product you like.

Charging capacity:

Not all high-priced battery chargers are suitable for bigger batteries. Likewise, just because you find an affordable AGM battery charger doesn’t mean it won’t work well for bigger car models. This is why it is important that you check the charging capacity before landing your hands on a particular product.

Most chargers can charge batteries under 150Ah, while others can charge even more.

Conclusion:

For any vehicle owner, it is important that you own an AGM battery charger. You never know when you may need one. Hence, make sure you get a suitable product from the above list. However, don’t just get any battery charger. Make sure you do your research well first! Check each of the reviews in detail and compare it to the specifications of your battery. If it is compatible, you can go ahead and make your purchase without thinking twice!