Best Battery For 6.7 Cummins [2024 Review]

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After the massive success of the Cummins 5.9L diesel engine, Cummins 6.7 is all set to make history. This engine provides a respectable amount of torque which is 1075 lb-ft, along with a high output rating of 420 HP. To match this big bull energy, nothing below a premium quality battery should be used. That’s why, we bring you the best batteries for 6.7 Cummins of this year.

Top Best Batteries For 6.7 Cummins Reviewed

Before you make a purchase, especially online, make sure that the source is reliable. We highly recommend you to buy your batteries from a renowned site that has trusted product reviews like Amazon.

Furthermore, don’t forget to compare the price listed by other retailers on Amazon. Some retailers charge a bit less or more for the same battery. But, don’t worry! We have cut down this process for you. Thus, you can pick one of the batteries listed below faithfully.

ACDelco 94RAGM

Choosing faulty and incorrect batteries will significantly increase the number of visits to automobile engineers. However, something as simple as the correct battery can help you relax, which is why we’re looking at the ACDelco 94RAGM Professional AGM Battery.

And this is the first option on our Top three Cummins battery list. Let’s take a look at some of the battery’s essential features.

What is the most distinctive characteristic of this battery that makes it our top choice for Cummins 6.7L? The ACDelco 94 stands on the top of our favorite battery for 6.7 Cummins because it is a spill-proof AGM battery.

This battery has an extended lifespan, and one can boost its battery life and performance by using high-density negative paste.

The silver calcium-stamped alloy construction of this device is also a valuable feature, as it extends the life cycle and improves performance.

Furthermore, the inclusion of a calcium lead positive grid can improve conductivity and reduce resistance.

You’ll have enough power to start your truck even in colder temperatures with this dependable, solid, and well-designed battery.

It has a sturdy envelope separator with a puncture-resistant back to prevent shorts and improve acid circulation. Ultimately, if you have a 6.7L Cummins engine, this Volt battery might be the best option for you.


  • The battery has a vent cap design.
  • It has lead-positive grids.
  • The battery has a high-density negative paste.


  • The battery gets heated up quickly.

Odyssey Battery 94R

There’s a lot of commotion in the Odyssey Battery 94R market right now! Its ability to produce up to 850 CCA power is one of the key reasons it is the best choice for most truckers.

Aside from that, the rate of the battery is 1500 PHCA and 100MCA, indicating its power, performance, and efficacy. You won’t be able to find a better one than the SAE terminals! Let’s go deeper into the details.

According to Odyssey, AGM batteries are more potent and have a longer recharge cycle. The recharge cycles will improve the batteries’ typical efficacy, and you’ll have fewer cranking troubles when starting the vehicle, thanks to the faster recharge cycle.

Furthermore, the Odyssey 94R AGM battery has a 4 to 6 hour reboot time. It implies that the battery will perform optimally even on the coldest winter days. This Odyssey 94R-850 battery can start your 6.7 Cummins Turbo Engine no matter how long it has been parked in the garage.

The Odyssey 950 high-performance battery also comes with a wide variety of clever functions. The owner can place it in any way except the reverse terminals, one of the top-notch quality features.

It means that the battery can be placed anywhere inside the truck to start the engine. Once the battery is totally exhausted, as previously stated, the battery can complete a 100 percent charge in approximately 4 hours.

 It’s great for truckers and professionals who need to travel on cold, snowy days because it’s spill-free. The spill-free shape also helps to promote acid circulation.


  • It gets charged in less than 4 hours.
  • It comes with an assurance that you don’t need to charge it within two years of usage (after buying it).
  • It has SAE terminals.


  • The battery life is comparatively short.

Optima RedTop Series Battery

The appropriate AGM-type starter batteries are featured in the Optima RedTop Series battery, making it the best battery for the 6.7 Cummins category.

To achieve the ignition or starter, the 6.7L Cummins Turbo Diesel Engine requires exceptional performance. As a result of the spiral coil technology used to construct these Optima Batteries, the 8004-003 can handle 720 and 800 cold-cranking amps.

The Optima RedTop, one of the heavy-duty batteries, is suitable for most heavy-duty trucks and vehicles. This 12 Volt 800 Cold Cranking Amps Optima Battery provides the ideal power for the 6.7L Cummins engine to start up and fuel the accessories.

The fact that this Optima RedTop battery has a reserve capacity of 100 minutes is remarkable. It implies that even if the engine isn’t charging the battery, it can still deliver solid results for up to 1.5 hours. Isn’t this the best battery for a 6.7 Cummins Engine?

Poor weather and freezing winter nights may wreak havoc on a diesel engine’s starting and ignition! Worry not with the Optima redtop series battery, which includes an alternator with a 13.8 to 15 volts voltage range.

The battery can use the total capacity of 10 amps to start a 6.7L Cummins Turbo Diesel engine without difficulty.

Each year, several complaints concerning leakage and severe vibrations are filed with battery service providers. It is no longer the case with the Optima RedTop series battery, which features an anti-spillage construction as well as 15x more vibration resistance.


  • It has ten amps of supreme power.
  • Easy to install– comes with user friendly manual.
  • It comes with a leak proof design.


  • This battery is not suitable to charge up other accessories.

Features To Consider When Buying Batteries For 6.7 Cummins

Finding the right battery is not as simple as choosing the most powerful battery. There are several other features you must consider. Knowing that, buying batteries can seem complicated.

ProductCranking Amps (32 Degrees F)Reserve Capacity  Voltage Battery Terminal    
ACDelco 94RAGM  1,020 amps140 minutes  12 Volts  Top
Odyssey Battery 94R850 amps150 minutes12 Volts      Top
Optima RedTop Series Battery1,000 amps100 minutes  12 Volts        Top and side

Here are five features you must consider to buy the right battery for the 6.7 Cummins:

#1 Battery Size

When buying the correct battery for your 6.7 Cummins, one should be well aware of the dimensions of the battery. It’s because not every battery is the same. And even if they look the same, they differ in dimensions.

Cars lined up in a parking lot

It’s better to be pre-prepared than be confused while finding your batteries. You can take your owner or user manual along with you to the shop. If somehow you lost your user manual, it’s better to consult the battery owners. They can provide you with guides from which you can refer and find the one for your car.

Note: You have to be precise about the size of the battery because an oversized one won’t fit the battery tray, and the under-sized one will wear out before than expected.

#2 Price Of The Battery

An essential thing to note while buying a battery for your Cummins engine is to be in a reasonable price range.

Today most lead-acid batteries are available for under $200, while the price of deep cycle batteries is above $250

#3 Battery Age

Have you ever thought about why your lead-acid batteries fall short of service so quickly? Well, here’s why!

The lead-acid batteries work on an electrochemical reaction. Here, the diffusion of ions between the fluid and the rods helps generate power when electricity is passed through them and complete the circuit.

But, this system has a demerit.

Even if the battery is not in use or is just bought, it has started losing its life the day manufacturers made it. You must be wondering why? Well, it is because the diffusion of ions is already going on from the very first day leading to the lesser shelf life of the battery.

Today, this is the case in almost every battery that is available in the market.

Therefore, it is advised not to buy a battery older than three months from its manufacturing date.

Car battery

Moreover, if your car batteries are imported, ensure they are fresh and not more than 1 or 2 months older than their manufacturing date.

#4 Reserve Capacity

The Reserve Capacity of the battery is also denoted as RC on the label or referred to as standing capacity by some manufacturers. But what is RC?

Well, reserve capacity, as the name says, is the energy or power pre-stored in the battery before use.

This energy serves as a backup when the battery falls short of service or trips temporarily. Thus, the higher the RC, the higher the backup power.

To get the correct battery with appropriate RC, refer to the manual or user guide of the automobile. Odyssey Batteries come with the highest reserve capacity among the ones discussed above.

#5 Position of Terminals

 The next thing is to check that your battery fits the system. For that, you have to look for a new battery with the exact dimensions as your previous one.

Have you noticed the position of terminals on your battery? 

There are some inexpensive batteries in the market that have fantastic specs but the odd arrangement of the terminals, which often makes it difficult for the user to connect the wires as they are not long enough.

To fix this, many manufacturers today are focusing on making batteries with reversed terminals that can connect with the cables easily than before.


Starting your diesel engine in chilled winters may seem like breaking the ice with your head. But worry not, this guide highlights one of the top-performing batteries that provide a high CCA value to start your engine even in the nail-biting winters.