Best Battery for Dodge Ram 3500 Diesel (Top Picks and Buying Guide)

When it comes to keeping your Dodge Ram 3500 diesel running smoothly, choosing the right battery is essential.

Your truck requires a reliable and powerful battery to ensure that its electrical systems function properly, and picking the best one for your vehicle can make a world of difference.

With a range of options available, understanding battery specifications and considering different brands is crucial to making an informed decision.

Optima, NAPA, Duralast Platinum AGM Battery and Odyssey Batteries are the best recommended brands for dodge ram 3500 diesel.

The type of battery you choose for your Dodge Ram 3500 diesel can have a significant impact on its performance and lifespan.

Some batteries offer longevity and resistance to harsh weather conditions, while others are geared towards providing increased cranking power for large engines.

It’s important to consider your driving habits, environmental factors, and specific needs when selecting the right battery for your truck.

Additionally, optimizing the performance of your battery is key to ensuring its longevity and reliability.

Regular maintenance and proper charging techniques can help keep your battery in top condition, which will, in turn, support the seamless operation of your Dodge Ram 3500 diesel.

Key Takeaways

  • Selecting the right battery is crucial for optimal performance and longevity of your Dodge Ram 3500 diesel
  • Consider your driving habits, environmental factors, and specific needs when choosing a battery
  • Proper maintenance and charging techniques can extend the life and enhance the performance of your battery

Why Battery Type Matters for Dodge Ram 3500

When choosing the right battery for your Dodge Ram 3500 diesel, it’s essential to understand why battery type matters.

Picking the appropriate battery for your truck ensures peak performance, longevity, and reliability.

One battery type that stands out for its durability and high-performance is the AGM (Absorbent Glass Mat) battery.

These batteries are known for their excellent cranking power, fast recharge rate, and resistance to extreme temperatures.

Additionally, they are maintenance-free, which makes them a convenient choice for your Dodge Ram 3500.

The 94R battery, for instance, is a popular AGM battery recommended for a Dodge Ram 3500 diesel.

It provides adequate Cold Cranking Amps (CCA) and Reserve Capacity (RC) to handle your truck’s demanding electrical needs.

This Duralast Platinum AGM Battery with a BCI Group Size 94R and 850 CCA can be a great fit for your vehicle.

When selecting between different battery types, always pay attention to these key specifications:

  • Cold Cranking Amps (CCA): A higher CCA rating means better starting power in cold weather.
  • Reserve Capacity (RC): A longer reserve capacity ensures that your battery will provide power for a more extended period when the alternator is not working.
  • Battery size: Make sure the battery you choose fits your truck’s physical dimensions, terminal locations, and type. For example, the Dodge Ram 3500 typically requires a Group Size 34/78 battery.

As a Dodge Ram 3500 diesel owner, selecting the right battery type is crucial to maintain your truck’s performance and reliability in various conditions.

Don’t overlook the importance of investing in a quality battery, like an AGM 94R, to ensure your vehicle runs smoothly and meets its power needs.

Choosing the Best Battery for Dodge Ram 3500 Diesel

When looking for a new battery for your Dodge Ram 3500 Diesel, it’s essential to consider factors like battery type, reserve capacity, cold-cranking amps (CCA), and warranty.

Whether you have a 2005 or 2015 Ram 3500 Diesel, ST or L6 6.7L Diesel, choosing the right battery is crucial to keeping your truck running smoothly and efficiently.

First, decide which type of battery best suits your needs. There are lead-acid, AGM (Absorbent Glass Mat), and gel batteries available for diesel trucks like your Ram 3500.

While some may argue that standard lead-acid batteries are the best choice for durability in cold climates, others prefer AGM batteries for their maintenance-free design and resistance to vibration.

Reserve capacity is another important factor. This denotes the time (in minutes) the battery can run essential accessories if your diesel truck’s alternator fails.

For example, the DieHard Gold battery has 130 minutes of reserve capacity. A higher reserve capacity offers more peace of mind in case of emergencies.

Cold-cranking amps (CCA) measure a battery’s ability to start your Ram 3500 diesel truck in cold temperatures.

A higher CCA is useful in regions with harsh winters or high electrical load. Some recommended batteries provide CCA ranging from 600 to 850, depending on your needs.

Lastly, consider the warranty. A battery with a longer warranty period typically indicates higher confidence in the product’s quality.

It’s not uncommon to find warranties of 3 years or more, so make sure to factor that in when comparing options.

Keep in mind that choosing a battery based on your truck’s VIN can also help ensure a proper fit and compatibility.

By taking into account these critical factors, you can confidently choose the right battery for your Dodge Ram 3500 Diesel.

Considering Best Battery Brands for Dodge Ram 3500 Diesel 

When looking for the best battery for your Dodge Ram 3500 Diesel, it’s important to consider different battery brands to ensure optimal performance and longevity.

Here are some popular battery brands you can look into for your truck:

Optima Batteries are known for their robustness and long service life. Specifically, the Optima RedTop is a popular choice for high-performance vehicles like the Dodge Ram 3500 Diesel, thanks to its strong starting power and excellent resistance to common causes of battery failure.

NAPA offers a range of quality automotive batteries suitable for your truck. They produce dependable batteries with a good balance of power, durability, and affordability. You can check your local NAPA store or their website for suitable options for your Dodge Ram 3500 Diesel.

Duralast Platinum AGM Battery is another reliable option for your Dodge Ram 3500 Diesel. With a high cold-cranking amperage (CCA) and a 3-year warranty, this battery provides reassurance that your truck will start reliably even in the toughest conditions.

In addition to these battery brands, you can also explore other reputable battery manufacturers, such as Super Start or DieHard.

They offer a variety of battery options to suit different vehicle needs and performance requirements. Ensure that you choose a battery with the correct group size and CCA rating specifically for your Dodge Ram 3500 Diesel.

Remember to compare warranty periods, customer reviews, and lifespan expectations of different batteries before making your final decision.

By doing so, you will be well-equipped to find the most suitable battery for your Dodge Ram 3500 Diesel, ensuring optimal performance and reliability over time.

Understanding Battery Specifications

When looking for the best battery for your Dodge Ram 3500 Diesel, it’s important to understand the key specifications that determine a battery’s performance.

This will help you make an informed decision and choose a battery that meets your needs.

One crucial aspect to consider is the power of the battery. This refers to the amount of energy a battery can store and is measured in watt-hours (Wh).

The higher the power capacity, the more energy your battery can supply to start and run your truck.

Another important specification is the voltage of the battery. The voltage represents the electrical potential between the positive and negative terminals of the battery.

For a Dodge Ram 3500 Diesel, you should look for a 12-volt battery to ensure compatibility with your truck’s electrical system.

Capacity is another vital aspect. It indicates the total amount of charge that a battery can store and is typically measured in ampere-hours (Ah).

A higher capacity means the battery can supply power for longer periods, ensuring reliable performance even in demanding conditions.

One of the most critical specifications for a truck battery is the cold cranking amps (CCA). CCA measures the ability of the battery to provide sufficient current to start your engine in cold temperatures.

The higher the CCA, the more reliable the battery will be in colder climates. For a Dodge Ram 3500 Diesel, it is recommended to have a battery with at least 750 CCA.

The internal resistance of the battery also plays a role in its overall performance.

A battery with lower internal resistance can deliver higher currents without generating excessive heat, which is essential for maintaining the battery’s lifespan.

To find the best battery for your Dodge Ram 3500 Diesel, pay attention to these key specifications. By understanding the importance of power, voltage, capacity, CCA, and internal resistance, you can confidently choose a battery that provides optimal performance, reliability, and longevity for your truck.

How to Optimize Dodge Ram 3500 Battery Performance

To ensure your Dodge Ram 3500 diesel delivers the best performance, it’s crucial to optimize your truck’s battery performance.

By following these tips, you can extend the life of your battery and improve your truck’s starting capability.

Before we dive in, it’s important to keep in mind that cold cranking amps (CCA) play a significant role in battery performance, especially during colder weather. Selecting a battery with a higher CCA rating can provide better starting power to your truck.

First, regularly clean and inspect your battery terminals. Over time, dirt, corrosion, and debris can accumulate on the terminals, leading to poor electrical connections and weaker starting performance. By keeping the terminals clean and tight, you can maintain the efficiency of your truck’s electrical system.

Next, avoid exposing your truck’s battery to extreme temperatures. Extreme heat and cold can reduce battery capacity and affect its overall performance. Try to park your truck in a garage or under a shelter when possible to protect it from harsh weather conditions.

Maintaining proper battery voltage is also important. The alternator in your truck is responsible for charging the battery, so make sure your alternator is functioning properly. If you notice any issues with your battery not holding a charge, it might be time to check the alternator.

In addition to the tips above, it’s always a good idea to test your battery’s performance periodically. Many auto parts stores, like AutoZone, offer free battery testing and can help you identify potential issues with your truck’s battery.

Finally, consider upgrading to a higher-performance battery if you have ongoing issues or if you want the best possible performance for your Dodge Ram 3500 diesel. Premium batteries with higher CCA ratings and advanced technology, such as AGM batteries, can provide better starting power and longer life.

By following these guidelines, you can optimize your truck’s battery performance and ensure smooth, reliable starting power for your Dodge Ram 3500 diesel.


For a 2016 Ram 3500 diesel, the recommended battery size is BCI Group Size 94R with 850 cold cranking amps (CCA).

The Duralast Platinum AGM Battery is one such option that offers excellent performance and comes with a 3-year warranty.

Where can I find the battery location in a Ram 3500 diesel?

In a Ram 3500 diesel, you can find the batteries located under the hood, typically on the driver’s side of the engine compartment.

There are generally two batteries; one is slightly larger and serves as the primary battery, while the smaller one is for supplemental power.

How long do batteries typically last in a Ram 3500 diesel?

Batteries in a Ram 3500 diesel can typically last anywhere from 3 to 5 years, depending on factors such as driving conditions, climate, and proper maintenance.

Regularly checking the battery for corrosion, ensuring clamps are tight, and inspecting cables for damage can help extend the battery life.

Why does a Ram 3500 diesel have two batteries?

A Ram 3500 diesel has two batteries to provide additional power for the various electrical components in the truck.

The diesel engines require more electrical power for starting, particularly in cold climates.

The second battery also helps support the increased electrical demands of larger trucks, such as charging systems, trailer brakes, and heavy-duty accessories.

Should I replace both batteries in my diesel truck?

It is generally recommended to replace both batteries in your diesel truck at the same time. This ensures that the batteries have equal capacity and can share the electrical load evenly.

Replacing only one battery can put extra strain on the older battery, which may lead to premature failure.

What brand of batteries does Dodge typically use?

Dodge typically uses a variety of battery brands throughout their lineup. Some popular options include Optima, Interstate, and NAPA.

Optima Red Top batteries are known for their reliability and have been used in Dodge Ram diesel trucks for several years.