In AGM batteries, the sulfuric solution is absorbed by the glass mat. Thus, this feature makes the best AGM battery virtually leak proof and much safer to use than other lead-acid batteries. Moreover, these batteries can be shipped much easier because the hazardous material transportation restrictions do not apply to the AGM batteries. Plus, AGM battery plates can either be molded into flat plates or squeezed into cylindrical cell tubes.
Furthermore, best AGM battery have been tested and found to possess a very low resistance. Hence, these batteries are capable of delivering high currents without using too much of its internal resource. Also, AGM batteries are considered to be very reliable despite being practically maintenance free.
But, you would still need to change the top of the battery so as to prevent the sulphates build up. Once in use, the batteries have been reported to be very low in charge, thus serving much longer than other types of batteries.
Table of Contents
- Comparison of 10 Best AGM Batteries in 2021
- Top 15 Best AGM Battery Reviews in 2021
- 1. Optima RedTop Starting Battery
- 2. Universal Power Group AGM Battery
- 3. Weize Deep Cycle AGM Battery
- 4. ACDelco Advantage AGM Battery
- 5. Interstate AGM Deep Cycle Battery
- 6. Renogy Deep Cycle AGM Battery
- 7. Vmaxtanks AGM Deep Cycle Battery
- 8. WindyNation BattaMax AGM Battery
- 9. Mighty Max High Rate AGM Battery
- 10. Optima BlueTop Marine Starting Battery
- 11. Vmax Marine Deep Cycle AGM Battery
- 12. Mighty Max SLA AGM Battery
- 13. Odyssey Heavy Duty Commercial Battery
- 14. Casil Deep Cycle AGM Solar Battery
- 15. VmaxTanks VMAX AGM Battery
- What Ratings Are Given to Batteries?
- What Are the Advantages of AGM Batteries?
- Why CCA Rating Matters?
- Frequently Asked Questions (FAQs)
- Relevant Resources
What Are They Made Of?
Best AGM batteries comprise of large plates made out of lead that are submerged in an acidic electrolyte. When you turn on the vehicle and the battery starts discharging, the lead plates begin to cover in sulfate while the acidic electrolyte turns into an alkaline one. Similarly, once the AGM battery charges, the alkaline electrolyte turns back into an acidic one because the sulfate from the lead plates goes back into the electrolyte.
On the other hand, lead batteries are very likely to corrode and could be hazardous to handle. That’s because the electrolyte can cause serious skin burns if it leaks. Plus, such batteries are not eco-friendly because if you discard them the wrong way then they could contaminate soil and water. Furthermore, lead-acid batteries are more exposed to the vibrations of the vehicle engine thus they are much more likely to leak.
Comparison of 10 Best AGM Batteries in 2021
|Optima RedTop Starting Battery||Check Price|
|Universal Power Group Battery||Check Price|
|Weize Deep Cycle Battery||Check Price|
|ACDelco Advantage AGM Battery||Check Price|
|Interstate AGM Battery||Check Price|
|Renogy Deep Cycle AGM Battery||Check Price|
|Vmaxtanks Vmaxslr125 Battery||Check Price|
|WindyNation BattaMax Battery||Check Price|
|Mighty Max Battery||Check Price|
|Optima BlueTop Marine Battery||Check Price|
Top 15 Best AGM Battery Reviews in 2021
1. Optima RedTop Starting Battery
Another best AGM battery that offers customers long lasting and maintenance free experience. It comes in two different sizes and does not require an acid pack, unlike other models. Moreover, it quickly recharges and has a protective mechanism in place to prevent overcharging and thus ruining the battery itself.
Furthermore, if you would like to prolong the batteries life once it will serve its time, you could just change the electrolytes instead of changing the AGM battery. Also, this model can work in a wide span of temperatures ranging from 0 degrees Fahrenheit to 100 degrees Fahrenheit.
- Electrolytes can be replaced
- Available in different sizes
- Quickly recharges
- Works in a wide range of temperatures
- Terminals were reported to be hard to connect to
2. Universal Power Group AGM Battery
A great option for customers looking to buy the best AGM battery on a budget as this combo pack will stock you up for a long time. However, the size of the batteries is rather small as just little over 5 inches in length and 4 inches in height.
Also, the batteries come in a packaging box without any cables or mounting harnesses, therefore, think about how you are going to mount it and with what prior to the actual installation.
- Double pack
- Quick recharge
- Good customer support
- Can corrode
- Available in one small size only
- No warranty
3. Weize Deep Cycle AGM Battery
This rechargeable battery is used in many applications. The manufacturer recommends it for electric scooters, golf carts, and other electric vehicles. But I’ve seen it on an RV camp before. I saw it on a number of RVs of different electric capacities.
When I say it in an RV with solar panels I couldn’t help myself but ask the owner about its reliability. It has been named as one of the best AGM deep cycle batteries. As you may expect, he told me the battery handles itself well for the entire night when fully charged.
I was pleasantly surprised especially since he also told me the battery is not too expensive. If you look it up, you’ll see the 12V battery comes with a 1-year warranty and you’ll only need cables to hook it up as it comes with included mounting screws.
- Lasts the entire night in a regular RV
- Made with overheating protection
- Suitable for electric vehicles and emergency lighting
- Not the best for longevity
4. ACDelco Advantage AGM Battery
This battery is one of the long-term designs for all of you looking to power your boats. This is also why it comes with a 2-year warranty as opposed to the 1-year policies mostly available on this list. But the performance of this battery is solid.
However, this doesn’t mean you can forget about it in a boat and only use it twice per year. Even as a premium release, this is one of the best AGM battery designs made to be used frequently. If you have a boat, use it as often as possible to keep the battery from discharging.
- Backed by a 2-year warranty
- Based on quality lead
- 100% spill proof construction
- Some of its chemicals are blacklisted in California
5. Interstate AGM Deep Cycle Battery
Interstate Sealed Lead Acid Deep Cycle best AGM battery is made to be 100% spill proof and has been reported to be quick to recharge and work great in different temperatures. Moreover, it is well insulated so as to resist shocks, vibrations and heat.
Plus, these batteries are available in several sizes thus you can be sure that you will find the one that will fit your lawn mower. Also, the manufacturer offers a 2-year warranty and great customer support at all times.
- 2-year warranty
- Trustable brand
- 100 % spill proof
- Quick to recharge
- Works at high and low temperatures
- Made in Mexico
6. Renogy Deep Cycle AGM Battery
Available in 100Ah and 200Ah, this battery is marketed as an RV design. But its sealed construction recommends it for all types of maritime use scenarios. If you want a versatile performer which doesn’t sit unused on a boat, this can be it.
Since the batteries resist thousands of charging and discharging cycles, they are also versatile in other situations. Once on land, they can be paired for even more power for a camper with multiple electronic consumers.
- Made with corrosion-resistant Pb-Ca alloy
- Optimized for the instant high current discharging
- Sealed design
- Not as shock-resistant as other AGM batteries
7. Vmaxtanks AGM Deep Cycle Battery
Another great option of AGM battery is being manufactured locally thus it costs cheaper than imported ones. This model of best AGM battery comes in 2 different sizes and has a gel layer on all sides to prevent any potential leaks. Moreover, customers have reported it is really easy to install and connect the terminals to the electrical cables.
Plus, the customer support is great just in case you are going to need to contact them for more information, instructions or any other help. Lastly, the manufacturer of these AGM batteries offers a 30-day money-back guarantee hence you can be assured of the quality.
- Money-back guarantee
- Easy to connect
- Comes in several sizes
- Very heavy
- Not insulated from shocks, vibrations or leaks
8. WindyNation BattaMax AGM Battery
If you’re always making a purchase based on price, this is the best AGM battery for you. As one of the best AGM batteries for the money, it is very affordable. The brand also offers discounts and multiple purchases. If you’re looking to get 2, 3 or 4 pieces, the batteries are offered at a discounted rate.
Used as an off-shore battery, it has the advantage of its slow discharge. Specifically made for deep repetitive discharges, it is also versatile. You may connect it to your RV when going fishing on-shore.
- Excellent multi-pack value
- 99% pure virgin lead design
- Easily powers 55lbs Trolling motors
- Not the most shock-proof outer box
9. Mighty Max High Rate AGM Battery
Mighty Max High Rate AGM Battery is a long-lasting and durable battery that will require minimum maintenance on the customer’s part. Plus, loyal customers have reported the battery recharging very quickly while the overcharging mechanism will prevent the battery from overheating and become useless.
Furthermore, the manufacturer has designed this battery in a way that will allow you to change the electrolytes instead of changing the battery. This will prolong the batteries life and will save you money in the long run.
- Requires little maintenance
- Comes in two sizes
- Trustable brand
- Capable of working in low temperatures
- Can potentially leak
- Terminals were reported to be hard to connect to
10. Optima BlueTop Marine Starting Battery
Optima Bluetop 12V AGM Battery is made with a sealed lead acid battery that is reliable and long lasting. Moreover, this battery comes with a new blue top design that features a gel mat lining so as to prevent any leakages. Plus, customers have reported this model of Optima AGM Battery having a wide working temperature range as well as great vibration and shock insulation.
Furthermore, it can be recharged pretty quickly while its compact size will allow it to be mounted in a number of safe ways. Lastly, the manufacturer offers a 60-day money back guarantee and good customer support that was reported to be friendly and very helpful.
- Trusted brand
- Can be mounted in a number of ways
- Great vibration and shock insulation
- Quickly discharges
- Some customers have reported the battery corroding after few months only
11. Vmax Marine Deep Cycle AGM Battery
Vmax Deep Cycle Maintenace battery has been praised by many motor enthusiasts as durable and reliable best AGM battery plus the manufacturer has implemented a double layer or gel mat so as to make the battery more resistant to vibrations and shocks that the working motor engine will make.
Moreover, customers have reported friendly and helpful customer service plus the Vmax Deep Cycle AGM battery can be recharged thus prolonging its life and saving you the money you would otherwise spend buying a new AGM battery.
- Double layer gel mat
- Resistant to shocks and vibrations
- Good customer service
- The large size of the battery might not suit all motor vehicles
12. Mighty Max SLA AGM Battery
Suitable for float and cyclic applications, it is a battery that is normally used on larger fishing boats or on demanding campers. You should not buy this battery for the extra power if you don’t need it. For some, it is simply too large and too heavy.
- Maintenance-free design
- Made with a 200Ah output
- Factory-activated AGM
- Long in some boats with its 20.7” length
13. Odyssey Heavy Duty Commercial Battery
This fully rechargeable AGM battery can be mounted in a number of ways plus it has been reported to perfectly resist shock and vibration emitted by the engine thanks to the thick layer of gel insulation.
Moreover, customers can choose from 3 different sizes depending on their vehicle type and its specifications. All Odyssey AGM batteries have been tested and CCA rated thus you can be assured that this battery will work flawlessly even in cold weather.
- CCA rated
- Works great in hot and cold weather
- Absorbs shocks and vibrations
- No warranty
14. Casil Deep Cycle AGM Solar Battery
As far as zero-maintenance AGM batteries go, this is one to remember. It is one of the best AGM marine batteries and if you want it to power your fishing journeys, you can certainly rely on its simple approach. Made with a spill-proof design, it is ready to deal with the most demanding marine scenarios.
When compared to other batteries, it has the advantage that it doesn’t need any acids or other fluids added to it. However, you will need to purchase the connecting wires yourself as it is not a premium release.
- Works out of the box
- Spill-proof design
- Resists shocks
- No included cabling
15. VmaxTanks VMAX AGM Battery
VmaxTanks VMAX V35-857 AGM Battery has been on the market for decades, it has since gained a large and loyal customer base thanks to its reliability, safety and 2-year warranty from the manufacturer. The battery case is made from rugged plastic that will withstand scratches, scuffs and other impact damages.
Moreover, this plastic body makes the battery highly resistant to heat, shock, and vibrations that could potentially cause a leak. Plus, it works at a wide range of temperatures and has a glass mat for added protection from potential electrolyte leakages. The packaging box contains a clear instruction booklet on how to install and connect the terminals yourself.
- Durable plastic body
- Reliable and long lasting
- Resistant to heat and vibrations
- Easy to install
- Manufacturer’s warranty
- Available in one size only
- Some customers reported it corroding
What Ratings Are Given to Batteries?
All vehicle batteries are rated on the CCA (Cold Cranking Amps), which stands for Cold Cranking Amps, just like vehicle batteries are plus these ratings are a good indicator on how much current the AGM battery will be able to deliver when the outside temperature is around 0 degrees Fahrenheit.
However, keep in mind that this is just a rating to indicate how robust a certain battery is and not whether it will work in winter. Another type of rating is based on the size of the battery, these ratings are assigned according to the American Battery Council.
Nowadays, most batteries are assigned a rating of U1 which means that they are about 8 inches long and 5 inches wide. Such dimensions are important because different vehicles have different sized battery trays. Plus, the battery must also be connected to the battery cables thus buying the right sized battery for your vehicle is crucial.
What Are the Advantages of AGM Batteries?
The main advantage of AGM batteries is their recharging speed, with some battery models being capable of recharging almost five times faster than regular flooded version. Moreover, most best AGM battery models are very compact and usually range from 35-100 Ah plus they are often used in different vehicles to power radio, windshields and mirrors.
Furthermore, AGM batteries are often used in motor and marine homes because they have great cold temperature resistance. However, AGM batteries are very sensitive to overcharging hence you will have to be very careful not to overheat or burn the battery. Also, try to keep the AGM batteries away from the engine compartment and any other hot compartments.
Why CCA Rating Matters?
The output of the battery might not be of concern to you when you have a small power needs however it will become an important factor in choosing the best AGM battery if you have a large marine vehicle with large power need.
Thus, check the recommended rating of CCA that the manufacturer of your vehicle has specified. Choosing an AGM battery with very low CCA rating can lead to your vehicle not starting at all. On the other hand, a higher CCA than your vehicle can take could lead to your battery wearing out.
Frequently Asked Questions (FAQs)
Q: Do AGM Batteries Require a Special Charger?
A: Yes, they do. It might seem alright to use a different sort of battery charger in a pinch, but that only increases the chance of damaging your AGM battery. Unless a charger is specified to be used for charging the AGM battery you have, please don’t use it. Prolonged use will only shorten the lifespan of your battery and increase the risks of a mishap.
Q: Why Do AGM Batteries Fail?
A: Most often, AGM batteries fail because of overcharging. This type of battery prefers slow and steady charging. If you’ve been using a charger that is inappropriate for an AGM battery or left it on charge for longer than recommended, there’s a chance it might fail.
Q: Can I Trickle Charge an AGM Battery?
A: It’s not advised. Trickle charging tends to dry out the battery and will lower its lifespan. It can be tempting to connect your AGM battery to a trickle charger when you’re leaving it unattended for an extended period. However, a better solution is to charge it overnight once a month.
Q: How Long Should an AGM Battery Last?
A: Six years. If your AGM battery is kept in a condition as ideal as possible, it will still retain 80% of its original capacity. However, that’s often not the case, and you might see the battery’s performance declining even before that.
Q: How Do I Know if My AGM Battery Is Bad?
A: From its physical characteristics. It’s as easy as taking a good look at your AGM battery to see if there’s any visible damage. If the battery case is dented, bulging, punctured, leaking, discolored, it’s a cause for concern. One or more broken terminals or leaking are also danger signs.
Q: How Can I Make My AGM Battery Last Longer?
A: You can do three things to make your AGM battery last longer.
- First, make sure you’re using a dedicated charger for your AGM battery. Don’t use just any old battery charger lying in your shed, a trickle charger, or a split charger.
- Second, do not overcharge your battery. On the other hand, also do not partially charge it. Both will be damaging to the battery.
- Third, keep your battery at the recommended temperature when it’s charging.
AGM batteries are often also called VRLA, valve regulated lead-acid battery or SLA which stands for a sealed lead acid battery. Moreover, these AGM batteries have their own variants, for example, the gel cell battery which involves using silica dust on the electrolyte to form a thick and putty-like gel layer. Plus, because of their specific construction, these batteries can be mounted in a number of ways and do not require much maintenance.
However, they will still need some cleaning and testing for longer life. On the other hand, lead acid batteries are made out of an acid and water solution that makes up the electrolyte. This electrolyte can potentially cause chemical burns to the skin and the eyes if the battery leaks. The water from the electrolyte can evaporate during the batteries work while hydrogen and oxygen get released when the lead plates are heated.
These gases are very dangerous because they are combustible have the potential to blow up hence it is crucial for you to take all the safety precautions when dealing with lead-acid batteries. Most scientists believe that a large number of explosions occur when the electrolyte level drops thus allowing for oxygen and hydrogen to accumulate. Then when the battery is started, a spark is created that could ignite these gases.
To protect yourself, always install and connect the best AGM battery in a well-ventilated area plus never smoke around the battery. Also, think about wearing gloves and maybe even an apron when you will be handling the battery, charging or installing it. Lastly, never forget to wash your hands thoroughly after lead-acid battery handling and check for battery leaks every once in a while.