Best Batteries for Diesel Trucks: Made For The Heavy Duty Demands Of Vibrations And Heat

Batteries wear out with time, and if yours is getting up there in years, you'll want to invest in a new one. Now, it can be a bit tricky to identify the best battery for diesel trucks, and that's exactly why we wrote this article. By tracking down the top options, we've streamlined the search so you can find the perfect fit for your Cummins, Duramax, or Power Stroke. Let's take a look at the leading contenders, broken down alongside everything you need to know to make your pick.

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The Drive aggregates reviews and research from all over the internet to figure out which products are worth buying. We also put out shopping guides to help you understand how to assess the value of these things on your own. As our editorial cousins at Car Bibles say, “Knowledge is horsepower!”

With impressive cold cranking amps, Optima Batteries RedTop is a quality choice for diesel trucks. Everything is made to extend its lifespan, boasting triple the durability versus other models. It uses absorbent glass mat technology to ensure a stable, efficient charge. Through the use of the patented SpiralCell tech, this battery has individual cells, wound in a spiral pattern. These pair with the lead-oxide coating on the pure lead plates to facilitate reliable battery performance. Not prone to degradation or spills, this battery is tough against vibration, neither losing effectiveness or getting cracked. The Red Top series is compatible with a wide range of vehicles. Durable and powerful, this Optima battery is a quality pick overall.

It’s worth noting, however, that Red Top batteries are expensive compared to OEM. As many of you might know, Optima's quality control department does need to improve as some folks end up with faulty batteries. It is essential to inspect your battery upon arrival and hold your warranty information close because of it.

The ACDelco AGM Battery is designed for long life and maximum performance. The battery has a calcium-lead positive grid that increases the level of conductivity and provides low resistance for energy transfer. It also increases the battery’s power holding and distribution capabilities when in use. In addition, the battery is filled with a highly viscous, negatively-charged paste that prolongs the life of the battery and promotes optimal performance. A notable feature of this battery is its durable envelope separator, including a puncture-proof back panel, which increases acid flow circulation while minimizing shorting and damage risk. The panel keeps the battery cool and generally extends the lifespan of the unit. The unit is 100 percent leakproof thanks to its vent cup design that greatly reduces the risk of acid spillage.

A major drawback of the battery is its weight and size. On average, it is heavier than other AGM batteries. It's also limited in terms of compatibility, pushing many truck owners to look elsewhere.

Getting a new battery doesn’t have to be a choice between effectiveness and cost. The Odyssey Automotive and LTV Battery comes at an affordable price and doesn’t forego quality. It offers substantial power and if the battery ever drains, it quickly returns to charge. The deep cycling ability is where it stands out most, working at high efficiency to promote its lifespan. A spill-proof AGM model, this battery is crafted specifically for intense road conditions. The technology used to partition the cells and encase the battery formula was inspired by military designs. Thanks to its tough exterior and internal components to buffer vibration, this battery can handle even the roughest of roads. With a highly compatible design, this battery fits in the majority of diesel trucks.. 

It warrants a note that, though this battery is usually reliable, leaving it without a proper charge for long periods of time will likely lead to failure. This is a particular concern for those in cold areas as exceptionally low temperatures are a proven issue for many.

This AGM battery from XS Power uses an electrolyte solution suspended in fiberglass. It has a cold cranking power of 1,000 and a maximum output of 3,300 amps. The discharge capacity is 65 amp-hours. The entire unit is spill-proof, thanks to its sealed design. The valves are regulated, and it has vibration resistance. This battery has an ultra-low internal resistance, which facilitates its long-term operation. You can also mount it in almost any direction and maintain optimal performance. This is due to the reinforced ABS plastic case. The M6 terminal bolt also comes with the battery, which makes installation a breeze. 

One of the primary drawbacks of this battery is its weight. This battery is usually significantly heavier than other battery options. This battery also experiences a noticeable drop in performance when temperatures drop, resulting in a decline in cold cranking power and voltage. 

Standing out through its suspended electrolyte system, the Deka 9A34 AGM Intimidator Battery is a powerful option. With an impressive 750 cold-cranking amps, this is a rugged battery that’s built to withstand extreme driving conditions. The external case is crafted to limit vibrations and prevent the risk of spills, despite intense road conditions. High impact situations are also no threat, meaning it’s a safe battery to take off-road. The glass mats built into the system are structured to absorb extra electrolytes, ensuring optimal performance in any situation. Its heavy-duty performance and ability to remain reliable while traveling over difficult terrain make it a fantastic pick for off-roading enthusiasts. 

One thing to keep in mind is that this battery seems to struggle with quality control issues with some folks reporting faulty units arriving. Also, while it's a reliable battery, it isn't the best choice for cold climates.

The Optima Batteries RedTop is our pick for Best Overall. This is a tried and tested model from a trusted brand, built to last, and competent in all but the most extreme situations. But, if you need a reliable replacement that won’t break the bank, then check out our value pick, the ACDelco AGM Battery

Unless you’re an automotive expert, you would be forgiven for not knowing what battery best suits your vehicle and needs. This guide will explain what key features and battery types to consider before purchasing. If you still have any questions, check out the FAQs section.

This type of battery performs two key roles: offering high cold cranking amps and running your truck’s electrical system for a long time. Using an electrolyte formula proximal to metal plates improves the battery’s efficiency. The conductivity is improved by the close placement of the battery formula and metal connection. Discharging more slowly than other batteries, AGM models are made to be long-lasting. An eco-friendly solution, these batteries are almost entirely recyclable. These are also suitable for environments with cold weather as they are more capable of retaining a charge in frigid conditions. 

Easily the most common in diesel trucks, these batteries look identical on the outside but function very differently than AGM models. An acid formula blends with lead to store electricity. Depending on your preference, you can opt for wet or gel cell lead batteries. Wet cell models have a compartment to hold the electrolytes. You can add distilled water to it in order to get an extra kick out of the battery so long as it's not sealed. Conversely, gel-type batteries use a viscous formula to suspend the electrolytes. These are better for warm climates since the gel accounts for the thinning of fluids in heat. However, this same trait makes the gel an issue in cold temperatures. Base the type you choose on your climate.

This refers to the amperage output of your battery, measured at zero degrees Fahrenheit or minus 18 degrees Celsius. It’s a metric of the amps put out within 30 seconds. Taking this amount and dividing it by 7.25 in order to calculate the amperage hours, telling you how much it will last at standard power usage. The higher the cold-cranking amps, the better the battery will perform in cold environments or if left unused for long periods. Since CCA is measured at zero degrees, if your area is prone to cold snaps, aim for the highest number possible. 500 CCA is a good starting threshold. 

Your battery’s reserve capacity (RC) determines how long your battery can run while outputting 2.5 amps. If you’ve ever left your radio on while the truck’s off, only to realize the battery died, you can blame the low RC. Higher reserve capacity means that you can run more equipment on the battery before it loses power. While lead-based batteries have a basic level of reserve, AGM models are far superior in this regard. These batteries hold onto almost 80 percent of residual energy after discharge. With that, you can run tech off of your 12-volt adapter and the truck will keep working. 

If the battery isn’t compatible with your truck, you’ve hit a stopping point. Instead of running the risk, look at compatibility first. Using the make and model of your truck, you can pinpoint compatible batteries based on the structure of the OEM model. More often than not, you can match the group size of the batteries and end the search there. In order to fit into place, the battery must be the same size (or smaller) than the battery you’re replacing and the terminal connections must also be a match. If you’re off-booking it, be sure to leave clearance between the battery and the hood. Aim for 4 inches, though 3.5 is usually sufficient. Also, the battery should never come in contact with the hood of your vehicle

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