Best AGM Car Battery Reviews

AGM battery is quickly becoming popular among car enthusiasts because of its high-performance, durability, and low discharge rate. This type of battery is much superior to the traditional lead-acid battery in terms of performance and durability, which is why it has become successful commercially.


5 Best AGM Car Battery

Optima 8016-103 D34M Starting Battery

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Mighty Max Battery ML35-12 – 12V

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Universal UB121000-45978 AGM Battery

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Optima 8006-006-FFP 34M Marine Starting Battery

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Advantages of the best AGM Car Battery

It delivers a lot of amperages which is ideal for sports cars and muscle cars. The best AGM car battery can serve for up to 8 months without any discharge. You cannot expect this kind of performance from a typical lead-acid battery. The best AGM car battery comes with high cold cranking amps ideal for cold temperatures. The fiberglass and wire mat inside the AGM battery is tight which prevents it from damages caused by vibrations.


The Optima brand is quite popular, and this 8016-103 D34M Cranking Battery is the bestseller. It is used as a dedicated cranking battery. This versatile battery can be used for both cranking and deep cycling operations. This popular trolling motor battery is also used for many camping sites. You can use it to power both boats and RVs. With its 55Ah rating, it can last for long.

The vibration resistance is 15 times more resistant than a wet-cell. The number of recharges it can take is 3 times as much as the cheaper batteries. This AGM battery is maintenance-free and there’s no need to add distilled water to it. It is spill-proof and so you can mount it in any position. It measures 10 by 6⅞ and it is 7 and 13/16 inches tall and performs brilliantly with 750 cold-cranking amps. So it can start your battery even in adverse weather condition.

It has a reserve capacity of 120 minutes and can discharge 25 amps for 120 minutes when used at 80 degrees F (26.7 degrees C) until the voltage goes down to 10.5 volts. It recharges quickly, and with 100 amps to recharge, you need about 35 minutes to get 90% charge capacity. It’s possible for the low internal resistance. However, to make sure you don’t overcharge it, you will need to use its own charger. It better to follow the charging instructions to take care of the battery properly.


Things we liked

  • It can start a motor with no problem even at zero-degree Fahrenheit.
  • It can power boats laden with lots of gadgets.
  • You can recharge it within a short time.
  • It can last for a thousand recharging cycles.
  • It’s spill-proof, and you can mount it at any angle.
  • It’s maintenance-free.
  • It won’t overcharge providing that you use the right charger.


Things we didn’t like

  • Without the appropriate charger, you might end up overcharging the battery.



Usually, the AGM battery is more expensive than other batteries, but the affordable Mighty Max is here to solve the problem. However, this model comes with a lower power rating of 35 AH and can deliver less amperage over a period of an hour compared to others.

If you do not need a lot of amperage from your battery, this battery is suitable for you, but for small and casual use, this is an excellent model to consider. This product comes with a 1-year warranty, an affordable price, and reliability. So this is a good car AGM battery for anyone who needs reliability rather than power in their battery.


Things we liked

  • Very affordable. Value for money
  • Non-spillable design
  • Universal connector leads ensure that you can install it in any type of vehicle


Things we didn’t like

  • The low power rating of 12V/35AH. Not as powerful when compared to other models



The Universal battery represents the true power of the AGM battery. This is a heavy duty AGM battery having a power rating of 12V/100AH. It provides you with the amperage necessary to power even the most demanding electrical appliances in your car. Its long reserve capacity of 195 minutes ensures lower discharge rate. The only downside is it comes with 1-year warranty. However, the lifetime of this heavy duty AGM battery is higher than that, and it is one of the best deep cycle battery available on the market today.

Things we liked

  • Intended for heavy-duty applications
  • A very long reserve capacity of 195 minutes
  • Can be installed in any position


Things we didn’t like

  • Comes with a one-year warranty only



The VMAXTANKS vmax857 Tm AGM battery having a 35Ah rating is extremely durable and lasts longer than typical batteries because of its premium-performance and military-grade metal plates which makes it stronger, and capable of withstanding vibrations better. Its long-lasting outer casing is made of extra-tough ABS plastic. This 25-pound battery is easy to install because of its small size measuring 7.7 inches by 5 inches with a height of 6.1 inches. If you are on camping, you can run your TV and a DVD player with this battery. It doesn’t need maintenance and can be positioned at any angle. If you’re looking for a light and compact battery with enough power for your car, this is the right choice for you.

Things we liked

  • Ultra light weight
  • It’s very compact
  • It’s spill-proof so you can set it at any angle
  • Very durable
  • You don’t need to do any maintenance for it


Things we didn’t like

  • For best results, you’ll need to get the VMAX BC1204 12V 3.3Amp charger
  • It’s very limited if you have one to use on a campsite
  • It cost a bit more than other brands



The Optima 8006-006 34M is another top quality car battery designed to work in any weather. Its thick and durable plastic exterior provides 15 times more vibration resistance compared to other batteries. This maintenance-free battery provides a very steady and stable performance. It provides 800 cold cranking amp and has a reserve capacity of 100 minutes. It weighs only 40 pounds, and you can easily mount it in any position in your car.

Things we liked

  • Provides with sure cranking and string cranking
  • Higher reserve capacity
  • Fifteen times more resistant to vibration
  • Optimal cranking power even on bad weather
  • Doesn’t need maintenance
  • Lightweight
  • Two-year warranty


Things we didn’t like

  • You need to purchase a separate deep cycle battery for a trolling motor
  • Overcharging the battery can cause permanent damage


Buying Guide for Best AGM Car Battery

Having Knowledge about all the best AGM car batteries available on the market may not lead you to making the right decision. So we have come up with the following specific factors that you should consider before you buy the best AGM car battery.



AGM batteries last twice as long as the wet-cell batteries. However, longer warranty indicates a longer lifespan as well. So it’s better to consider the battery that comes with the highest warranty.


Vibration Resistance and Durability

Cars experience vibrations while moving on the road. So it’s wise enough to go for the battery that can withstand vibrations more effectively than others. Choose a spill-proof and shock-resistant battery for more durability.



Make sure that amperage per hour is not too high and suited for your vehicle. A battery with a high Amperage requires more time to recharge. If you do not use your vehicle for long enough, then a battery with big amperage per hour will be counterproductive for you.


Cold Cranking Amps

Cold Cranking Amps shows how much of electrical power a battery can generate within a 30-second duration, at zero degrees Fahrenheit temperature, before the voltage ultimately drops to below the 7.2 Volts threshold which is the minimum power needed to crank an engine.


Reserve Capacity Rating

Reserve capacity is the total duration that a fully-charged battery remains alive. For example, a battery 150 minutes of reserve capacity rating can last for two and a half hours while discharging a load of 25 Amperes. The higher reserve capacity is preferable for optimal performance.


Caring and Maintenance Tips for the Car Battery

A car battery powers your car’s electrical system including the lights, and the radio. They all rely on the proper working of the car battery. So read the battery maintenance tips below to learn how to take care of it.


Don’t put extra pressure on the battery

Before buying a battery, consider the amount of power needed in your car. Make sure you buy one that provides with at least 10 percent extra powerful than required.


Give it some time to cool off

After you charge the battery, it’s recommended that you give it some time to cool off to maintain its performance.


Follow charging instructions

A new battery shouldn’t be charged fully until the plate formation process is complete. So stop charging it when it is around 20 percent below the full capacity.


Avoid charging it wet

Don’t charge your battery with a sealed battery charger when the battery is wet. A wet battery needs won’t charge fully without a high voltage and results in battery corrosion.


Avoid Overcharging

One major downside of AGM batteries is they are sensitive to overcharging. It’s impossible to avoid overcharging AGM batteries with traditional battery chargers because they have no indicator that shows whether the battery is fully charged or not. Fortunately, there are several smart chargers on the market that are perfect for charging AGM batteries and won’t harm your batteries under any circumstance. So it’s wise to buy an appropriate charger along with your AGM battery.


Use a voltmeter

Use a voltmeter for taking the volt reading and testing the load.


Daily maintenance

Recharge the battery as soon as it gets empty. Otherwise, its charge capacity will decline. Clean all the connectors, including the terminals and the cable connectors often and keep the upper surface dry.


Final Verdict

In the light of the above discussion, we can conclude that AGM car battery is unbeatable considering its performance while it costs almost the same as a quality lead-acid battery. A regular AGM battery can last up to 8 months or more without a recharge because of its low discharge rate, and it has made it suitable for those who often keep their cars in the garage for a long period of time.


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