What could possibly be worse than the Monday morning commute to work?
How about when you go to start your truck one cold January morning in preparation for your drive and all you get from the truck is endless cranking or a dull click from the starter?
Of course, batteries are pushed the hardest in the winter and in our freezing conditions it was really no surprise that the fail so often in these conditions.
Unfortunately, I speak from experience, as this had actually happened to me. I hadn’t driven the truck at all that weekend, so my batteries were just done with life after sitting inactive that long in the cold.
I learned a couple of important lessons that day, number 1 being that jumper cables do you no good at all if no one is around to give you a jump, number 2 being that when 5 year rated lead acid batteries haven’t been replaced in 7 years, they’re pretty darn prone to fail at any point.
What is the best truck battery?
If you shop around in stores and online these days, you’ll find that there are more than a dozen different main battery brands. What you probably didn’t know (and neither did I) but there’s really only a few of the main manufacturers that are actually producing the batteries for all of these different brands.
In case you were wondering, the breakdown of the manufacturers of the different mainstream brands are as follows:
Johnson Controls makes Duralast (for Autozone,) EverStart, AutoCraft (Advanced Auto’s brand) as well as Diehard and Interstate.
Exide is another of the big guys, they put out batteries under their own Exide brand, as well as under Orbital, Bosch and Marathon.
EnerSys Energy Products is the company behind the Odyssey brand batteries.
East Penn Manufacturing is well known for producing the Deka brand automotive batteries.
Which size batteries to buy?
The comparisons below focus mainly on which of the group 65 batteries are the best option, as this is the size I needed for my 6.0 powerstroke. Of course, if you are in the market for a new truck battery, you would want verify that your truck uses this size group also before buying one (a lot of diesels do).
For other trucks, check the following:
- 2000-2005 Dodge Ram w/Cummins 5.9L: Group 65 Requires 2 Batteries
- 2006-2017 Dodge Ram w/Cummins 6.7L: Group 94R Requires 2 Batteries
- 2003-2007 Ford Powerstroke 6.0L: Group 65 Requires 2 Batteries
- 2008-2014 Ford Powerstroke 6.4L: Group 65 Requires 2 Batteries
- 2015-2017 Ford Powerstroke 6.7L: Group 65 Requires 2 Batteries
- 2008-2010 Chevy Duramax LMM: Group 48 Requires 2 Batteries
- 2011-2016 Chevy Duramax LML: Group 48 Requires 2 Batteries
Take note: If your truck uses two batteries, it is best to have a matching set, as it will extend the overall life of your truck’s electrical system. Always replace in pairs for a dual battery setup.
Battery Comparison
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Odyssey 65-PC1750T Automotive and LTV Battery
Odyssey has been making the best batteries around for quite awhile now, and while they are definitely not the cheapest option, they are virtually unbeatable in terms of quality. This monster in particular provides 950 CCA (cold cranking amps) which would be enough power to start the most stubborn of trucks, even in extreme weather conditions. The sealed AGM (absorbed glass mat) design of the battery will hold up to almost all conditions that you can throw its way, from vibration to very cold and very hot temperatures no problem.
Amazon
Features
- Cold Crank Amp (CCA)- 950
- Better warranty: Limited 3 and 4 year full replacement warranty - not pro rata
- Includes SAE Automotive terminals
- Mounting flexibility: Non-spill able design, vibration resistance- design protects against high impact shock and mechanical vibration
- Extreme temperature tolerant- Operating temperatures from -40 degree Celsius (-40 degree Fahrenheit) to 45 degree Celsius (113 degree Fahrenheit).
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Deka Intimidator Extended Life AGM Battery 9A65
Skip the inflation of buying a name brand, and go right to the manufacturer with these Deka batteries. These are made by East Penn Manufacturing, who have been behind the scenes of many of the most popular battery brands for decades. This model has the AGM technology along with 860 CCA at 32° F to start you up reliably, even in colder temperatures. The advantages of the AGM construction are vibration resistance (good for off-road) and longevity. The Deka brand in particular is an exceptionally good value because of the elimination of the middle man who slaps an auto parts or battery store brand on and marks up the final cost for no good reason – as they’re still an East Penn made battery.
Ebay.com
Battery Features:
20 amp hour rate: 75
Battery End Type: Top Post
BCI Group Size: 65
CA at 32 degrees F: 860
CCA at 0 degrees F: 750
Country of Origin (Primary): US
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XS Power D6500 XS Series 12V 3,900 Amp AGM
The XS Power D6500 is actually an AGM battery, which means it has the superior glass mat inside. It’s also made in the USA, which is good to see these days. Apparently these XS Power batteries are used in a lot of custom audio cars, so that’s a good indicator of massive capacity which translates well for diesels.
XS Power D6500 XS Series 12V 3,900 Amp AGM High Output Battery with M6 Terminal Bolt
Features
- : The 12V XS Power AGM battery features sealed, maintenance-free AGM tech, offering leak resistance and long lifespan. Perfect for powering many Ford, Lincoln and Mercury models and more high-energy accessories like audio systems or other electronics in all weather conditions.
- : This 12V Deep Cycle Small AGM battery offers 1100 cranking amps (CA) and 968 cold cranking amps (CCA) for reliable engine starts in extreme weather. It powers car audio systems, electronics, and high-demand devices, keeping your ride smooth in all temperatures.
- : This 12V powersports battery features a sealed, leak-proof AGM design, is maintenance-free, and includes M6 terminal hardware for easy installation. Perfect for custom setups, with a 3-year warranty for long-lasting performance.
- - : This 12V AGM deep cycle battery(Group 65) offers 3800 max amps, 86 amp-hours (AH) capacity, and 174 minutes of reserve power. It operates seamlessly Secondary 3000W/4,000W Range and its compact size (11.8" L x 6.80" H x 7.20" W) and lightweight design (53.81 lbs) ensure versatility. Backed by a 3-year warranty.
- : Weighing only 53.81 lbs, the XS Power D6500 is designed for effortless portability and installation. Its compact size makes it perfect for powering aftermarket accessories like car audio systems, power inverters, or LED lights, providing high power without the bulk of traditional batteries.
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Delphi AGM Group 65 Battery
This Delphi has surprisingly good pricing, but also with a trusted name brand behind it and AGM technology. Many folks swear by this battery, it is a popular option with a lot of diesel guys. Boasting high cycling capabilities and being very charge receptive, as well as 100% leak proof, it’s a really good choice for most daily drivers.
Delphi BU9065 MaxStart AGM Premium Automotive Battery, Group Size 65
Features
- Extended cold cranking amps delivery means more power for today's demanding electronics
- Group 65 battery with 750 CCA (cold cranking amps) and 150 R. C. (reverse capacity)
- 20x the vibration resistance of conventional batteries
- Superior vibration resistance, optimized component compression , and fortified posts, straps and welds
- Fit type: Vehicle Specific
Hard start issues caused by low batteries
On a diesel truck, the amperage of your batteries is of even more importance than on a gas powered vehicle. When you turn your key and engage the ecm, glow plugs, ficm, fuel pump and starter, a huge draw is put onto the batteries, and they really need to be healthy for everything to work as it should.
I’ve seen trucks before that sounded really healthy and fine when cranking over, but just seemed to not want to start. I later found that this was because the batteries were not supplying enough amperage for all of the ancillaries to do their jobs.
With this in mind, if your truck starts having issues with starting, the first thing to test would be the batteries, if they are older than their rated lifespan.
Testing Batteries
If you’re not sure if your batteries are actually bad or not, the best way to find out is by hooking up a battery tester and seeing what the readout and load test have to say about how healthy your batteries and charging system are.
You can always do a quick multi meter check for the minimum 12v when the truck is off and at least 13v running, however a battery with a bad cell can still put out 12v but not be able to provide enough amperage.
The best way to take all of the guesswork out of the equation is with a battery testing tool such as this one:
FOXWELL Battery Tester 12V Automotive Battery Analyzer Health/Faults Detector BT100 Pro
Features
- Classic Edition, More Reliable: With over 13 years of brand expertise and 9 years of continuous upgrades, Foxwell prioritizes customer trust. BT100 Battery Tester offers lab-grade precision via advanced conductance technology and a smart chip (99.6% accuracy) at a DIY-friendly price, delivering rapid results and 5 professional recommendations (replace/charge/monitor) to prevent unnecessary swaps—saving over $120 annually. Tip: For 12V lead-acid batteries only: AGM, EFB, GEL and Regular-Flooded.
- Easy to Read & Use: This 12v battery tester features large backlit LCD screen ensures clear visibility in both bright daylight and low-light conditions. With a simple 3-step process requiring no technical skills—connect the clamps to the battery terminals, select the battery type , and input the CCA/AH values—battery tester 12v automotive instantly analyzes SOH (State of Health), SOC (State of Charge), CCA , and internal resistance, delivering professional-grade diagnostics. Critical Note: Insufficient CCA can leave your engine dead in freezing weather, while abnormal internal resistance in a single battery cell may doom the entire pack to failure.
- Not Only Accurate, But Knows You Better: Foxwell BT100 battery tester delivers precise measurements with its upgraded intelligent chip, enhanced copper clamps (strong conductivity), and automatic temperature compensation. Ideal for 12V battery vehicles, it helps detect battery issues so you can replace it on time during the warranty period. Whether it's the hot summer or the cold winter, use the BT100 to test your battery before heading out, saving you time and money Tip: Suitable for 12V ATV, MOTORCYCLE, SUV, LIGHT TRUCKS, BOAT
- Help You Make the Right Decision:Tired of vague ‘Good/Charge/Bad’ guesses? Automotive battery tester cuts the uncertainty with 5 expert-level diagnostic results—factoring in undercharging, poor cable connections, and hidden flaws—to slash false alerts by 70% and save you from costly misjudgments. Whether you’re tackling daily errands or facing critical moments, this tool arms you with confidence. Pro Tip: When testing in-vehicle, disconnect all accessory loads, ensure the key is OFF, and close doors to eliminate interference.
- Track Battery Performance & Eliminate Guesswork: This 12v auto battery tester features robust data logging, allowing users to easily access the last test results to track changes in battery performance and detect potential issues early. Foxwell battery analyzer tester also supports nine languages, eliminating any concerns about language barriers while reading the results
FICM Damage caused by bad batteries
Another big thing to watch out for, especially with the 6.0 powerstroke, is bad batteries taking out your FICM (Fuel Injection Control Module). A defective FICM can easily keep your truck from running correctly, or even at all, often throwing codes for all of the injectors, which is a dead giveaway.
It’s a good idea to always periodically check you batteries to make sure that they are not putting excessive load onto the charging system, which is what ends up damaging the FICM.
Read more about how to trouble shoot and repair your control module in our FICM repair guide.
Conclusion
Hopefully this guide has been informative and has given you a better idea of which batteries you need for your truck. As always, if you have any questions or concerns feel free to leave us a comment below! Thanks for reading!
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Both Odyssey and Northstar are part of EnerSys. Great to have the mapping of company to brands at the beginning of the article.
Odyssey has derated the ODP-AGM94R H7 L4. I bought two today from a Ram 3500. The label on the batteries differs from the website. I have access to other models to compare their label to the website. The key differences are:
CCA reduced to 840 (was 850)
PHCA reduced to 1430 (was 1500)