7 Best Car AGM Batteries of 2021

Jerry Wilson
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With all of the car batteries available on the market today, it can be an overwhelming task to find the right one.

Whether you’re looking for a premium battery to get you through the weekend, or you need a deep cycle battery to support your solar or RV systems, the variety on offer can only confuse you more.

So, in order to find the right one for your vehicle, you need to know a few more details.

Whatever your requirements, you’ll find one that works for you below.

NameCategoryProduct
Universal Power Group 12V 100Ah Solar Wind AGM SLA DEEP Cycle VRLA Battery 12V 24V 48VBest OverallUniversal Power Group 12V 100Ah Solar Wind AGM SLA DEEP Cycle VRLA Battery 12V 24V 48V
Mighty Max Battery ML35-12Budget PickMighty Max Battery ML35-12
Optima Batteries 8016-103 D34M BlueTop Starting and Deep Cycle Marine BatteryUpgrade PickOptima Batteries 8016-103 D34M BlueTop Starting and Deep Cycle Marine Battery

1. Universal Power Group 12V 100Ah Solar Wind AGM SLA DEEP Cycle VRLA Battery 12V 24V 48V

Our rating: 9 / 10

Universal Power Group 12V 100Ah Solar Wind AGM SLA DEEP Cycle VRLA Battery 12V 24V 48V

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Pros:

  • Made with lead and calcium, offers incredible deep cycling
  • Extremely high voltage
  • Long-lasting battery
  • Top quality battery
  • Highly efficient
  • Very affordable price
  • Ideal for both commercial and home use
  • Lasts up to three times longer than the old style batteries

The Universal Power Group is one of the top rated car AGM batteries of 2020 available on the market. It comes pre-charged and is spill proof to give you maximum safety of use.

Apart from being spill proof, this car AGM battery is also shock proof, which makes it ideal for camping and boating use.

Being made of AGM technology, it is not just spill proof, but also offers exceptional deep cycling for up to three times the life cycle of the standard battery.

2. Optima Batteries 8016-103 D34M BlueTop Starting and Deep Cycle Marine Battery

Our rating: 8 / 10

Optima Batteries 8016-103 D34M BlueTop Starting and Deep Cycle Marine Battery

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Pros:

  • Maintenance free
  • Customizable with accessories
  • Great brand reputation, 5-year warranty

Cons:

  • Not a lot of background information
  • Heavy

This Optima battery is number one because it has a lot of positive consumer reviews to back up its claims of quality. It is a great choice for your marine system.

It has a dual-purpose 100-Amp fuse block and 1/0 gauge battery cables for both motorcycles and marine applications. It is a well-rounded product.

It is an 8 cell battery made from AGM technology. It is therefore extremely resistant to vibration and it also weighs less than a flooded cell battery. It weighs 75 pounds (34kg).

3. Mighty Max Battery ML35-12

Our rating: 8 / 10

Mighty Max Battery ML35-12

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Pros:

  • Excellent price to value ratio
  • Longer cycle life than standard batteries
  • No watering frequency

Cons:

  • Doesn’t handle extreme heat well
  • Passive safety valve

Duraguard U1 12V 35Ah size 12V 35Ah Quantity 1 Compatible With SUV, Suv, Truck, Battery Brand Mighty Max Battery Place Of Origin CHINA Model Number ML35-12 Type AGM Battery, Deep Cycle.

This is one of the best-selling AGM deep cycle batteries and Mighty Max Battery has a history that is trying to exceed the customers’ expectation of quality and service. Their depth of experience in developing batteries for the powersports industry, which includes ATVs, motorcycles, personal watercraft, jet skis, snowmobiles, and more ensures that they have an understanding of what’s required to produce the best battery in the industry. That’s why they are compatible with motorcycles, ATVs, snowmobiles, personal watercraft and more.

The Mighty Max Battery ML35-12 U1 is battery that is powerful and safe as well as a combination of modern and traditional technology. The dual terminals on the battery can be easily accessed and the liquid seal allows for vibration resistance. The 12 Volt 35 AH Mighty Max Battery ML35-12 U1 is reliable.

4. Odyssey PC680 Battery

Our rating: 8 / 10

Odyssey PC680 Battery

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Pros:

  • Six-Cell AGM Battery Designed To Do It All
  • High Amp Hour Battery With 25-Year Shelf Life
  • Designed For Cruisers, Harley Davidson & Sport Bikes
  • Maintenance Free & Fully Sealed – Will Not Leak, Spill Or Rust
  • Highly Energy Efficient Battery With Coppertop & Pure White Top

The Odyssey PC680 Battery is designed to do it all. This battery is ideal for Harley-Davidson motorcycles, as well as most cruisers and sport bikes. With a bold 6-cell HD casing, the Odyssey PC680 boasts a substantial 430 CCA rating that is extremely powerful in all weather conditions and a one year free replacement warranty.

These batteries are designed in a deep-cycle structure that ensures longevity and durability. This battery is also resistant to vibration, shocks, and impacts.

The additional features of this AGM battery include its capacity of maintaining a 100% depth of discharge for 25 years and the time to recharge (5 hours). Its free replacement warranty is also strictly adhered to, and the pure white top is free of lead.

5. Optima Batteries 8025-160 25 RedTop Starting Battery

Our rating: 8 / 10

Optima Batteries 8025-160 25 RedTop Starting Battery

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Pros:

  • Super high cranking amps for a long start-up
  • Light weight
  • Spot where there’s full caps
  • Perfect for marine purposes
  • Perfect to use up to 16V
  • 2 year warranty for maintenance-free
  • Easy to install

As the saying goes, you get what you pay for. Optima has been in business for over 30 years and in that time they have learned a thing or two about building high performance, value priced batteries. The Optima Batteries 8025-160 25 RedTop has been around for a long time and for good reason. Bug these batteries have every achievement since eight years and counting and is still going strong!

Over the years this model has won several tests and tests and it's still standing. No wonder that Optima is one of the most beloved car batteries by many professional mechanics.

The Red Top is a solid choice for the car that will never leave you stranded. The battery has a continuous rating of 220 Amps and a fast rate of 280 amps. This is much higher than the average starting battery you would find in the auto section of your local store. This battery offers 270 cold cranking amps and can lay to 16 volts of power.

6. ACDelco 94RAGM Professional AGM Automotive BCI Group 94R Battery

Our rating: 6 / 10

ACDelco 94RAGM Professional AGM Automotive BCI Group 94R Battery

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Pros:

  • Universally compatible
  • Stays cool
  • Tough
  • Great lifespan and good price

The ACDelco 94RAGM Professional AGM Automotive Battery is a great budget battery for your vehicle. Designed to be the industry standard for car batteries, this ACDelco AGM battery is known for its sealed design that prevents gas leaks and corrosion. It also has a top-notch 5-year warranty.

The included design of AGM optimizes the services of the battery, and it provides you with plenty of power for almost any vehicle out there.

It includes a post-mounted battery terminal, heavy-duty welded steel cable, and an eyelet that allows the battery to be secured to your vehicle. You can even get this battery installed by a local shop that has an AGM battery installation kit.

7. DieHard 38188 Group 34R lead_acid_battery

Our rating: 5 / 10

DieHard 38188 Group 34R lead_acid_battery

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Pros:

  • Lightweight
  • Comes in 4-pack
  • Relatively inexpensive

Unlike most products who have at least 2-3 reviews posted on Amazon, this DieHard comes only with 16 reviews and it has 4.3 stars with a total of 10 positive reviews on Amazon. I’m not so surprised because most products from Diehard are very reliable and I would have to agree because I really like this DieHard AGM Battery, which is also excellent for emergency back up power source. This is the best AGM car battery if you are looking for a top-quality battery that is also affordable. It is obviously one of the best batteries out there. This battery is Pre-charged, maintenance free and leak resistant, which makes it a great choice for use in RVs, portable power tools and off-the-grid installations. Another good thing about this battery is that it comes with a unique vent design that allows gas to freely escape. The battery features Diehard's long life design that delivers years of service. The best thing is that this AGM battery can be used in any position, hot or cold. Since it is a dual purpose battery it can be used for dual purpose vehicles, boats, off the grid systems and many more uses.

8. DieHard 38217 Advanced Gold AGM Battery

Our rating: 5 / 10

DieHard 38217 Advanced Gold AGM Battery

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Pros:

  • The Electrolyte (acid inside) is sealed inside the battery
  • Tolerates extreme temperatures well
  • Charges quickly and holds its charge for a long time
  • A long life battery
  • Comes with a 5-year warranty
  • It can withstand overcharging well
  • Durable material

Cons:

  • Price is high
  • Not suitable for high-temperature climates

The Advanced Gold AGM battery from DieHard is strong enough to back up any starter yet light enough for your everyday drivers.

The Advanced Gold AGM operates at an open circuit of 13.2 V, while the nominal voltage is 12.6 V. The battery measures 5.01 x 2.75„ x 6.86„. The voltage level of 12.6 V found in this battery is by 7.6 V, and its terminal measures 7.9„.

This battery is capable of delivering powerful bursts of energy to start the worst of days. It is the perfect power source for vehicles that run for a long time. You can rely on it to give you long driving sessions with ease.

9. DieHard 38275 Group 35 lead_acid_battery

Our rating: 5 / 10

DieHard 38275 Group 35 lead_acid_battery

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10. DieHard 38232 Advanced Gold AGM Battery

Our rating: 5 / 10

DieHard 38232 Advanced Gold AGM Battery

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Pros:

  • It's durable
  • Maintenance free
  • Excellent value
  • Easy to install

Cons:

  • Slight hear rattle
  • Doesn't seal completely
  • Not compatible with all vehicles.

What makes the DieHard Advanced Gold such a great choice for most drivers is the fact that it offers a hard to beat combination of price, installation ease, longevity, and power.

Another thing that I liked about this particular model is the fact that it’s designed to work will all kinds of electrical systems, regardless of the manufacturer or model of your car (as long as it’s designed to use a lead acid battery, of course).

Likewise, the Power Start Advanced Gold also performs very well in most extreme weather conditions. This means it is also a great choice for people who live in colder climates where temperatures dip below zero from time to time.

Frequently Asked Questions (FAQ)

Are AGM batteries good for cars?

All lead-acid batteries, whether AGM, flooded, gel, or what have you, can work great as a car battery. It’s more a matter of personal preference and which battery type is most suitable for your vehicle.

For example, most standard cars and RVs use regular (also known as flooded) batteries. These have become more of a commodity product in recent years, which means that pricing is pretty competitive. Flooded batteries are also pretty tolerant of charging.

For more exotic vehicles, you may want to consider AGM batteries. These are made using Absorbed Glass Mat technology, which means they accept a more limited range of charging voltage. This technology also makes them gel batteries without the maintenance problems.

For more information on the difference between AGM and other battery types, click here.

What is the best AGM deep cycle battery?

Are AGM batteries worth the extra money?

Unless your vehicle has a battery that's actually in the engine compartment, then chances are good it has an “underhood battery,” or one that's located in an easily accessible spot in the front of the vehicle.

This puts a lot of vehicles in the AGM battery category, as these types batteries are specifically designed to be installed in these locations.

The advantage of AGM batteries is that they're maintenance free once installed. Obviously they still need to be charged, and extreme heat or cold can still harm them in some ways. But when it comes to regular maintenance they're self-contained, which is the main reason for the distinction between AGM batteries and other types of batteries.

Are AGM batteries better in heat?

For the most part, AGM batteries are better for hot weather. When it comes to car batteries, there is a lot of confusion around the differences between them. After all, if you’re the type of person who keeps their car for a long time, you’re likely still using a Lead Acid battery in your engine bay.

In truth, there are several reasons a person would want to upgrade to an AGM, and many of those reasons are related to the extreme heat that can damage or kill a normal battery. AGM batteries use less lead than a typical lead acid battery, which means an AGM weighs less and takes up less space in your engine bay. Also, the acid in an AGM is suspended in a gel, so when the battery is attacked by heat, the temperature of the acid doesn’t rise as much as in a traditional lead acid battery.

Conclusion

Our Recommendation

NameCategoryProduct
Universal Power Group 12V 100Ah Solar Wind AGM SLA DEEP Cycle VRLA Battery 12V 24V 48VBest OverallUniversal Power Group 12V 100Ah Solar Wind AGM SLA DEEP Cycle VRLA Battery 12V 24V 48V
Mighty Max Battery ML35-12Budget PickMighty Max Battery ML35-12
Optima Batteries 8016-103 D34M BlueTop Starting and Deep Cycle Marine BatteryUpgrade PickOptima Batteries 8016-103 D34M BlueTop Starting and Deep Cycle Marine Battery