The Ram 2500 runs on a 12-volt battery system, but the exact setup depends on the engine. Diesel models with the Cummins 6.7L typically use two 12-volt batteries, while most gasoline versions with the 6.4L Hemi rely on a single 12-volt battery. Always check the battery label or the owner’s manual for the precise group size and cold-cranking amps (CCA) for your specific truck and year.
Battery configurations by engine
The engine you choose largely determines how many batteries you’ll find under the hood and how they’re wired.
Diesel: Cummins 6.7L
- Two 12-volt batteries mounted in the engine bay, wired in parallel to provide higher cranking power for cold starts and heavy electrical draw.
Concluding note: If you have the diesel, expect dual batteries rather than a single unit, and verify the exact group sizes and CCA on the battery labels or in the owner’s manual.
Gasoline: 6.4L Hemi
- Typically a single 12-volt battery; some configurations with heavy electrical loads may use two, depending on model year and options.
Concluding note: For gasoline-equipped trucks, confirm the exact battery arrangement for your VIN if you’re replacing or upgrading.
Identifying your exact specs
To be sure you’re matching the right battery, use these steps to confirm the correct group size and CCA for your Ram 2500.
- Check the battery label for group size (the physical code, such as 86R, 65, or another designation) and cold-cranking amps (CCA).
- Consult the owner’s manual or Ram’s official specifications for your model year and engine.
- If in doubt, ask a Ram dealer or a qualified mechanic to confirm the exact battery configuration for your VIN.
Concluding note: Using the correct replacement battery helps ensure reliable starts and proper electrical performance, especially in cold weather or when towing.
Summary
In short, a current Ram 2500 typically uses a 12-volt lead-acid battery system. Diesel variants usually feature two batteries, while gasoline variants commonly use a single battery. Exact group sizes and CCA depend on the year and engine, so verify the specifications on the battery itself or in the owner’s manual.
What size battery is in the Dodge Ram Cummins?
Most newer RAM trucks will use either a DH7 or H8 battery.
What batteries go in a 2020 Ram 2500 diesel?
Super Start Platinum AGM Top Post Battery Group Size 94R H7 800 CCA 140 Minute RC - 94RPLT.
What battery does a Dodge Ram use?
Some of our most popular batteries for Ram vehicles are the Duracell Ultra Platinum AGM Group 94R Battery, the Duracell Ultra Gold Flooded Group 48 Battery and the Duracell Ultra Gold Flooded Group 94R Battery.
What type of battery is in a Ram 2500?
DieHard Platinum AGM – Battery : H7 Group Size, 850 CCA, 1000 CA, 140 Minute Reserve Capacity (Part No. H7-AGM)