Best AGM Battery: Buying Guide and Essential Tips

For a long time, lead-acid batteries have been the gold standard for car batteries. Aside from providing sufficient power to all sorts of vehicles, they’re also easy on the pockets.
But there’s a new type of car battery that’s slowly gaining ground these days--the Absorbed Glass Mat or AGM battery.

What Makes AGM Batteries Special?

Invented by the military in the early 1980s, AGM batteries were once designed to power combat vehicles and aircraft. But once it became commercially available, many drivers all over the world started turning to AGM models as their go-to car batteries.
Compared to the traditional lead-acid batteries, AGM batteries are much more superior when it comes to power and durability. They have fiberglass and wire mat components that make them less prone to wear and tear. These immovable components are installed very tightly, preventing damage caused by vibrations or rough roads.
Aside from delivering exceptional performance, AGM batteries are also known for their low discharge rate. Your car can stay idle for as long as nine months without suffering from any discharges. It also has the ability to withstand repeated draining and recharging cycles.

AGM batteries also feature high cold cranking amps (CCA), which make them ideal for driving in cold temperatures.

Over time, modern AGM batteries were equipped with smart and convenient features, like a fuel saving system, electronic safety, and power outlets that can supply power to mobile electronic devices.
It didn’t take long before it became available in the market, translating to instant commercial success.
Thinking of buying an AGM car battery? Take time to compare the best AGM batteries we have reviewed and find out which one is tailor-made for your driving needs.
optima 34/78 redtop

Optima 34/78 RedTop

The Optima 34/78 RedTop is one of the most reliable AGM batteries available today. Compact and lightweight, it can still deliver the a strong and energetic starting burst that only takes five seconds. This deep cycle battery can fire up your engine immediately after turning the car keys on.
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Instead of being loaded with impure lead flat sheets like the traditional units sold in the market, this model is loaded with superior quality coiled columns. Because of this, users can expect ultra-low ohms and unbeatable output with maximum vibration resistance.
The Optima 34/88 RedTops lifespan is also two times longer than lead-acid batteries. It also has an anti-leak design, so you don’t have to worry about filling it with liquids or chemicals since it is a 100% maintenance-free model. It also sports a high 720 CCA, which can easily start engines even in cold temperature.
What’s more, you also get to enjoy 36 months of warranty.

But due to its compactness, it might not fit in some vehicles. So, make sure that you check whether or not it fits inside your engine first. Some drivers might also find it a bit expensive.

Nonetheless, with its outstanding vibration-resistant design, this particular model is definitely worth investing on.
odyssey pc680

Odyssey PC680

At first glance, the Odyssey PC680 may look like a traditional lead-acid battery. But once you use it, you’ll realize that it’s a top quality full-on AGM battery that’s built to last.
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Known for its ability to resist extreme shock and vibrations, the Odyssey PC680 packs a punch for demanding vehicles such as trucks and sports car.

Its durability is a cut above the rest. Although its connector leads are smaller compared to other brands, they connect securely to other important components. It also has a leak-proof and non-hazardous design, which provides safety for both drivers and the vehicle itself. And apart from having a non-spillable design, its studs are also guaranteed to be corrosion-free.
This unit also comes with a two-year replacement warranty in case of trouble or damage, though current users claim is unlikely to happen. Its manufacturer assures users that the Odyssey PC680’s lifespan can last anywhere from three to ten years.

Because of its toughness and solid performance, the Odyssey PC680 is often lined up as one of the best AGM car batteries in the market.

But just like any product, it is not without flaws. It has a relatively low CCA value at 170, which makes it unsuitable for winter conditions. It’s also a bit pricier compared to other designs.

In spite of these drawbacks, the durability and longevity of the Odyssey PC680 are enough to deem it as a smart and practical AGM battery option
Read the full review of Odyssey PC680
xs power d6500

XS Power D6500

If it’s incredible power you are looking for in an AGM car battery, then you can’t go wrong with XS Power D6500.
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The name itself should give you an idea of what this particular unit is all about – power. It’s a sealed AGM that can power up 3000 to 4000W of car audio systems. In fact, many car owners are purchasing it as an add-on battery for supplying extra energy to their vehicle.

With this battery, you can crank up even the highest performing cars or vehicles. Its cranking ability can put out 1070 AMPS with a remarkable maximum output of 3900 AMPS.
Its exceptional design is also a huge selling point. The XS Power D6500 can fit securely in whatever engine or battery holder. It’s also leak-proof, without any external vents. You’ll have peace of mind knowing it prevents any hazardous leaks.

Due to the power it delivers, this model can be a little pricey. Still, with an energy that is a cut above the rest, the D6500 is definitely a very good investment.
mighty max battery ml35

Mighty Max Battery ML35-12

Regardless of the brand or model, AGM batteries are generally more expensive compared to other types of batteries in the market today. The price tag is one of the reasons why many people are still hesitant to buy it despite its advantages. But one company found a solution by creating the Mighty Max Battery ML35-12, a high-quality AGM battery that won’t burn a hole in your pocket.
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The Mighty Max Battery ML 35-12 is indeed more affordable compared to its rivals. But don’t let its inexpensive price deceive you since it still has the same top quality components found in other AGM batteries.

It has a non-spillable design just like other AGM models and has universal connector leads that can be installed in almost all types of vehicles. The parts and construction of the unit were designed with durability in mind.
Apart from enjoying affordable top-grade units, you also get a one-year warranty from the manufacturers.

You need to know, though, that this unit has a lower power rating. It only has 35 AH, delivering less amperage over a period of an hour compared to other AGM brands. It’s best suited for driving small and regular vehicles that don’t require loads of amperage and power.

Still, if you’re looking for value for money, then this model is worth looking at.
vmaxtanks slr125

Vmaxtanks SLR125

Now, if you’re looking for something that offers incredible power and high-performance, then the Vmaxtanks SLR125 is the most suitable battery for you.
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Built for solar panels and other alternative energy sources, this AGM battery has the capacity to produce more power. Plus, its storage capabilities allow you to reuse energy for later. Bear in mind that storing solar power can be very challenging, and this what makes this model more even more valuable. And since it’s designed for renewable energy, its recyclable quality makes sense.

The built and construction of the Vmaxtanks SLR125 are also solid and sturdy, thanks to its military-grade plates. This long-lasting battery has a remarkable float service lifespan of seven to ten years. This is definitely the best option for drivers or mechanics who want to go green.

But like any other AGM battery, it has its drawbacks. For one, it may not hold a charge as long as it should. You’ll also notice that the price range is at the higher end of the spectrum compared to other models.

Tips When Buying the Best AGM Car Batteries

Before ordering an AGM car battery, it is necessary that you take the time to consider several factors first.

There are multitudes of brands available in the market today, but not every single one of them is suitable for your driving needs.

Here are some tips on what you should consider to make sure you end up with the best AGM battery for your needs.


You don’t want to spend your hard-earned money buying products incompatible with your vehicle’s needs.

Although most AGM batteries are universally compatible with almost all sorts of vehicles, you still need to inquire and verify if the unit can power up your vehicle.

Keep an eye out for the amperage per hour. Make sure that it’s not too low or too high for the car you are driving.

Reserve Capacity

A battery’s reserve capacity is the number of minutes that a fully charged battery at normal temperature will discharge.

AGM car batteries have an outstanding high reserve capacity compared to regular batteries. But if your vehicle doesn’t require much amperage, then it is more practical to choose models with a smaller reserve capacity since it’s much safer and more affordable.

Cold Cranking Amps

Another important thing that you need to consider is the cold cranking amps or CCA. It’s the ability of the power source to produce a current in cold temperatures.

As mentioned above, some batteries have a higher CCA, while others tend to be on the low side. If you live in places with cold climates, then it is recommended that you purchase batteries that have higher CCA. Choose heavy-duty AGM batteries that start your engine immediately even at extremely low temperature.


The longevity or lifespan of your car battery should be considered as well. This is important since it dictates the amount of money you will be spending. 

Remember that these kinds of batteries can be very expensive, so it’s best to invest in a unit that can last for many years. Check out the reputation and ratings of the brand, as well as the warranty.

Final Thoughts

When choosing the best AGM battery, compare the different AGM car batteries listed above and find out which one is most suitable for your vehicle. Remember that not all of them are created equal. Make a wise decision and consider the factors we mentioned.

Buying the best one should not be as difficult if you keep these tips and pointers in mind. Asking for tips and recommendations from your friends and family members who have bought top quality AGM batteries before is also recommended.

You’ll be able to find the right power source unit if you consider your needs and listen to the advice of experts.

Frequently Asked Questions:

How Long Do AGM Batteries Last?

The battery life of different batteries varies from each other. Batteries do not have the same life span. While buying a battery, the quality and battery life should be kept in mind. Most batteries last for about 5 to 6 years but fade slowly after 2 to 3 years of service.

Should I upgrade to an AGM Battery?

Yes, AGM batteries provide many such advantages to convince us to upgrade.
An AGM battery withstands many extreme temperatures and large energy assets as compared to the conventional ones. AGM batteries are maintenance-free as well as leak-proof.

What are the different types of AGM batteries?

Advanced Glass Mat (AGM) battery is one diverse type of lead-acid battery built for either deep applications or starting up. There are no further types of AGM batteries.

How does an AGM battery work?

An AGM battery contains a glass mat separator that contains electrolyte solution between the plates of the battery. T hey are kept in dry form instead of liquid.
As it works, the electrolyte is transferred from the glass mat to a battery plate and pushes the battery to deliver its full energy.

How many years do AGM batteries last?

AGM batteries last for about 5 to 6 years if kept in charged position while not being used for an average of 12 volts. Although the working of the battery starts to fade after two years. AGM batteries are stronger and more advantageous.

Are AGM batteries good for cars?

If you are looking for a reliable and longer life for automobile batteries, AGM batteries should be used. AGM batteries are a great choice for High end and efficient vehicles. AGM batteries are skilled to charge at a faster rate and to work longer and resourceful with the car.

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