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7 Best Group 34 Batteries (2021 Review)

  • By: Chris Patton
  • Date: February 9, 2021
  • Time to read: 12 min.

If your vehicle uses a group 34 size battery, it goes without saying that you should only go for a group 34 size battery when looking for a replacement. If you’re looking to buy a group 34 battery, you’re just on the right page.

In this article, we have put together reviews of the best group 34 batteries – carefully selected based on design, performance, durability, brand trust, and buyer reviews.

best group 34 batteries

But before going to the reviews, let’s tell you some basics about group 34 batteries.

What is a Group 34 Battery?

Group 34 batteries are medium-large sized batteries designed for use in many applications. You can use them in automotive, industrial, marine, and off-the-grid applications as starting, dual-purpose or deep cycle batteries. The performance delivered would depend on the battery’s characteristics, type, and model.

Generally, group 34 batteries feature a 20h capacity in the 50 – 75 Ah range, a CCA rating typically between 750 and 900 cold-cranking amps (CCA), and 100 -145 minutes of Reserve Capacity (R.C.). These batteries’ physical dimensions are typically 10.25 (L) x 6.8125 (W) x 7.875 (H) inches.

You will also find some group 34 batteries labeled as “34/78” which means they can serve as either group 34 or group 78 batteries. These dual-group models are usually slightly larger than actual group 34 batteries and feature terminals that handle both applications.

Best Group 34 Batteries: Our Top 7 Picks

The market abounds with batteries labeled “Group 34”, but making the right choice from the huge pack can be quite daunting if you’re not in the know.

To make things easier for you, our research team has scoured the market for the bestselling options and compared them in terms of design, performance, versatility, brand trust, and consumer opinions.

And after cutting out the not-so-impressive options, we were left with these top recommendations that should give you the value you want.

1. Optima 8004-003 34/78 RedTop Starting Battery

  • Amp Hour: 50 Ah
  • Cold Cranking Amps: 800 CCA
  • Dimension: 10 x 6.88 x 7.8 inches
  • Reserve Capacity: 100 Minutes
  • Voltage: 12 V
  • Terminal Type: SAE Terminal
  • Weight: 38.8 lbs.

Our Review

The Optima 8004-003 34/78 RedTop Battery is a starting battery designed for vehicles that need an intense burst of ignition power for a reliable start every time. its 800 CCA rating means you can use the battery in extreme weather conditions and still get favorable results.

One feature that makes the Optima 8004-003 34/78 stand out is its six-pack design. This is due to its unique SpiralCell technology. This battery is made up of a series of spiral-wound cells containing two lead plates coated with lead oxide. This technology allows the battery to provide efficient power regardless of the temperature conditions.

Another feature that makes the Optima 8004-003 34/78 stand out is the AGM design.  This ensures the battery provides up to 15x more vibration and would last 2x as long as conventional batteries. You will also find that the battery is maintenance-free and spill-proof. You can also mount this battery in almost any position in your vehicle except upside down.

You will notice that this battery is labeled 34/78 rather than just 34. This means it can serve as both a Group 34 battery and a Group 78 battery allowing you to use it in more applications than the standard Group 34 battery. You should take note of the dimensions to ensure that it would fit your vehicle before settling for it. This battery measures 10 x 6.88 x 7.8 inches which is close and should make a perfect fit.


  • Delivers starting power even in extreme weather conditions
  • Offers great value for the price
  • Spill-proof and maintenance-free design
  • Faster recharging


  • Warranty issues when purchased online

2. Odyssey 34-PC1500T Automotive and LTV Battery

  • Cold Cranking Amps: 850 CCA
  • Dimension: 10.85 x 6.76 x 7.82 inches
  • Reserve Capacity: 134 Minutes
  • Voltage: 12 V
  • Warranty: 4-year full replacement
  • Terminal Type: SAE Terminal
  • Weight: 49.5 lbs.

Our Review

If you’re shopping for a group 34 battery the delivers reliable starting power that would get your vehicle started every time, then you might want to consider going for a model from Odyssey. With so many years of experience in the industry, Odyssey produces one of the finest and most reliable batteries you will come across in the market.

The Odyssey 34-PC1500T Automotive and LTV Battery features pure virgin lead plates which promote an increased plate surface area allowing the battery to deliver much more power than conventional types. This means the Odyssey 34-PC1500T would provide about twice the overall power and last a lot longer.

Whether you’re planning on using this battery for marine or industrial applications or you’ve got a high-performance car, the Odyssey 34-PC1500T is built to serve and it will do so without noticeable drops in efficiency for years to come.

Thanks to the AGM design, this battery wouldn’t disappoint even with years of use. Its sturdy construction ensures that the battery withstands all kinds of weather conditions and boosts its vibration-resistance. You will also find corrosion-resistant terminals, a sealed-design, and vibration-proof internal connections. The AGM design makes this battery spill-proof so you can mount it in almost any position except upside down.

Another benefit of this design is the longer storage time.  The AGM construction ensures a slow self-discharge rate allowing you to store the battery for probably years before its needs charging. It also charges faster than flooded types.


  • 3-10 years of service life,
  • Limited 3 and 4-year full replacement warranty
  • 70% longer cycle life
  • Mounting flexibility


  • Warranty issue with certain sellers

3. Optima 8012-021 D34 YellowTop Dual Purpose Battery

  • Amp Hour: 55 Ah
  • Cold Cranking Amps: 750 CCA
  • Dimension: 10 x 6.88 x 7.8 inches
  • Reserve Capacity: 120 Minutes
  • Voltage: 12 V
  • Terminal Type: SAE Terminal
  • Weight: 42.9 lbs.

Our Review

For your deep-cycle needs and high-performance requirements, the Optima 8012-021 D34 YellowTop Dual Purpose Battery could be the answer to your problems. This battery is designed to handle vehicles with heavy power requirements especially if you have extra electronics like audio devices, DVD players, heated seats, and just about any device that would need electricity to run.

It comes with 750 CCA rating and 120 minutes of reserve capacity and will deliver just the right amount of ignition power to get your vehicle started every time. The battery is also perfect for seasonal use. It comes with a slow self-discharge rate that allows you to store it away longer than flooded batteries before having to recharge it.

It also works efficiently in extreme temperature conditions. Whether you’re living in an area where the freezing cold is the norm, or you’re planning on using it frequently in the summer, this battery would work efficiently and effectively. It will also charge faster

This battery feature Optima’s unique SpiralCell technology which not only allows it to deliver more power than conventional types but also ensures that it is a clean and safe power source that won’t lead to any health complications or cause damages to your vehicle when put in use.

You will almost not have to maintain this battery thanks to the AGM design. This ensures that you won’t have to check for water levels or add water to the battery. It also means that you won’t have to worry about leaks. The Optima 8012-021 D34 YellowTop offers 15x the vibration resistance of traditional flooded batteries and can be mounted in almost any position.


  • Six-pack design delivers greater starting power
  • AGM separators eliminate acid spilling
  • Impact-resistant polypropylene case
  • Solid cast cell connections for increased durability


  • Expensive battery

4. ACDelco 34AGM Professional AGM Automotive Battery

  • Amp Hour: 60 Ah
  • Cranking Amps: 890 CA
  • Cold Cranking Amps: 740 CCA
  • Dimension: 10.2 x 6.6 x 7.9 inches
  • Reserve Capacity: 115 Minutes
  • Voltage: 12 V
  • Warranty: 36-month full replacement
  • Weight: 38.7 lbs.

Our Review

The ACDelco 34AGM Battery is one of ACDelco’s top models, featuring a standard AGM design with enhanced life alloy/silver calcium stamped alloy construction. Both features boost the battery’s cycle life and enhance its performance.

You will also find a calcium lead positive grid that allows for low resistance and boosts conductivity. In automotive batteries, a lower resistance is a big bonus as it allows the battery to charge faster. While the battery would charge faster, it shouldn’t discharge at the same rate when stored. Thankfully, the ACDelco 34AGM Battery is engineered to self-discharge slowly allowing you to place it in storage much longer than flooded batteries.

You will find a high-density negative paste that ensures the battery serves you two or up to three times as long as flooded batteries while improving and ensuring it maintains its top-notch performance.

Featuring a 740 CCA rating and reserve capacity of 115 minutes, this battery is designed to deliver the maximum power even when used in extreme temperature conditions. It will serve in industrial, automotive, recreational, and marine applications.

It also comes with a vent cap design that prevents acid leakage. In addition to that is a sturdy envelope separator with a puncture-free back which increases acid circulation and reduces the likelihood of shorts. Thanks to the improved acid circulation, this battery would remain cool when it use, which would increase its lifespan.

Lastly, you will find a long-term 36-month free replacement warranty. While the warranty claim process is not the easiest, it does give some assurance that you’re buying a high-quality battery.


  • Calcium Lead positive grid boosts conductivity
  • Robust envelope separator allows for increased acid circulation
  • Vent cap design that prevents acid leakage
  • High-density negative paste increases battery life


  • A bit pricey

5. Delphi BU9034 MaxStart AGM Premium Automotive Battery

  • Amp Hour: 55 Ah
  • Cold Cranking Amps: 775 CCA
  • Dimension: 10.2 x 6.6 x 7.9 inches
  • Reserve Capacity: 120 Minutes
  • Voltage: 12 V
  • Warranty: 36-month full replacement
  • Weight: 42.5 lbs.

Our Review

Delphi batteries are among the highly rated options providing superior power and a great price tag that makes them a better choice than those from many other brands.

The Delphi BU9034 MaxStart AGM is a group 34 battery designed to meet high electronic demands in modern cars with electronics such as heated seats and audio equipment. You will find a reserve capacity of up to 120 minutes which will keep your electric devices running even when your vehicle engine is off. You will also find the 775 CCA rating just enough to get your vehicle started even in extreme weather conditions.

Thanks to the battery’s component compression, you should enjoy a hassle-free installation. Being an AGM battery, you should be able to install it in just about any position except upside down. It also comes with a set of nice features including a sturdy construction that makes it highly resistant to vibrations that could otherwise damage the internal components.

In addition to that is a maintenance-free operation that won’t require you to check the water levels or adding water. You will also find a 36-month warranty. This gives more than enough assurance that this battery would last you for a long while.


  • Extended cold-cranking amps delivery
  • 20x the vibration resistance
  • Superior corrosion resistance
  • Durable build quality


  • Doesn’t perform best in very demanding applications

6. Deka 9A34 AGM Intimidator Battery

  • Amp Hour: 55 Ah
  • Cranking Amps: 955 CA
  • Cold Cranking Amps: 775 CCA
  • Dimension: 10.75 x 6.875 x 8 inches
  • Reserve Capacity: 120 Minutes
  • Voltage: 12 V
  • Warranty: 36 month
  • Weight: 41 lbs.

Our Review

The Deka 9A34 AGM Intimidator Battery is one of the best AGM Group 34 batteries that you can never go wrong with. This battery uses a special glass mat to absorb more electrolyte which ensures that the battery meets even the most intense power demands.

You will find this battery most capable in turner cars or off-road vehicles. It is designed to offer superior power and comes with a high-impact design that ensures it would last even in the toughest applications.

The Deka 9A34 AGM Intimidator Battery would fit a wide range of vehicles including GMC, Chrysler, Chevrolet, Dodge, SUVs, trucks, and vans. It will deliver 2x the endurance as well as twice the cycle life.

Featuring an AGM design, this battery is engineered to provide the needed power even in extremely cold weather conditions. This makes it a great pick if you’re living in areas where the temperatures drop to subzero. The AGM design also makes the battery much easier and less likely to self-discharge which ensures that you get good use out of the battery before it gives out.


  • Enhanced electrolyte suspension system
  • Premium maintenance-free starting and cycle service
  • Comes with vibration protection safeguards
  • Fast recharging


  • Short warranty period

7. Banshee Group 34, Deep Cycle Marine Battery

  • Amp Hour: 66 Ah
  • Cold Cranking Amps: 750 CCA
  • Dimension: 10.2 x 6.9 x 7.9 inches
  • Reserve Capacity: 100 Minutes
  • Voltage: 12 V
  • Warranty: 2-year
  • Weight: 37 lbs.

Our Review

The Banshee Group 34 Battery is designed to handle all deep cycling and power needs in marine applications. This battery is built to be sturdy using the most up to date materials that would ensure it lasts you a lot longer than most from other brands. Along with a sturdy design, you also get in-built unique features designed to make use in marine applications stress-free.

You will find a built-in hydrometer in this battery that tells you the current state of the battery life. This really helps so you won’t lose power in the middle of use and get stranded.

The Banshee Group 34 Battery is designed with Enhanced Flooded Battery Technology or EFB Technology. This is quite different from the standard flooded battery technology in the sense that the battery is more rugged, resilient, and reliable. However, it might not make for the best pick if you have used AGM batteries. EFB technology batteries cannot be installed or mounted on their sides or upside down which is one of the classic features of AGM batteries. However, you should expect improved charge acceptance and increased cyclic durability from this pick.

It can also provide engine cranking even in low temperatures. You should expect a lifespan of 400 charge/discharge cycles in 80 percent depth of discharge which is just as good as or even better than many AGM batteries.

Banshee claims its batteries outperform most brands on the market including spiral-wound batteries. There is actually some truth to this. Their batteries make use of density packed plates which allow for more plate surface area by eliminating the unused space between cylinders in spiral designs. This allows this battery to deliver more power than a spiral-wound battery of the same rating and features.


  • High-performance battery
  • Handle for easy carrying
  • Built-in hydrometer battery life indicator
  • Delivers 2x more power than conventional batteries


  • Not an AGM battery