2019 Ram 2500 Battery Size & Group

Quick answer

• BCI Group Size: Group 65 (gasoline), Group 31 (diesel)
• CCA Rating (minimum): 730 CCA (gasoline), 900-1000 CCA per battery (diesel)
• Reserve Capacity (minimum): 120-150 minutes (gasoline), 180-200 minutes per battery (diesel)
• AGM vs. Flooded: Can use either, but AGM is often preferred for its durability and resistance to vibration, especially in heavy-duty applications. Some diesel models may have come with AGM from the factory.
• Terminal Layout: Top post, typically configured for side-by-side placement.
• Physical Dimensions: (Approximate, varies by brand)
  • Group 65: 12.06" L x 7.44" W x 7.56" H (gasoline)
  • Group 31: 13.00" L x 6.81" W x 9.44" H (diesel)
• Dual-Battery Setup: Yes, diesel models utilize a dual-battery setup wired in parallel.

Replacement battery options

Finding the right battery for your 2019 Ram 2500 is crucial for reliable starting and powering all your truck's electronics. Here are some popular replacement options, keeping in mind that specific part numbers can vary by retailer and region. Always double-check fitment with your supplier.

• Interstate Batteries:
  • Gasoline (Group 65): MTP-65 or MTX-65 (AGM)
  • Diesel (Group 31): MTP-31 or MTX-31 (AGM)
• Optima Batteries:
  • Gasoline (Group 65): Optima YellowTop DH6 (H6/LN3 - check fitment, some Group 65 trays can accommodate an H6) or RedTop 65
  • Diesel (Group 31): Optima BlueTop 31M (marine/RV, but often used for heavy-duty applications, check for appropriate terminals)
• DieHard Batteries:
  • Gasoline (Group 65): DieHard Platinum AGM Group 65 or DieHard Gold Group 65
  • Diesel (Group 31): DieHard Platinum AGM Group 31
• Odyssey Batteries:
  • Gasoline (Group 65): Odyssey Extreme Series 65-PC1750 (check specific part number for BCI Group 65)
  • Diesel (Group 31): Odyssey Extreme Series 31-PC2150
• ACDelco:
  • Gasoline (Group 65): ACDelco Professional AGM Group 65 or Professional Group 65
  • Diesel (Group 31): ACDelco Professional AGM Group 31 or Professional Group 31

AGM vs. flooded — which does this vehicle need?

For your 2019 Ram 2500, you generally have the option to use either a traditional flooded lead-acid battery or an Absorbed Glass Mat (AGM) battery. While both will work, there are distinct advantages to each, and the best choice often depends on your specific vehicle and usage.

Flooded Lead-Acid Batteries: These are the most common and typically the most affordable. They perform well under normal conditions. However, they are more susceptible to vibration damage, require occasional maintenance (checking water levels in serviceable units), and can leak acid if damaged.

AGM Batteries: Many 2019 Ram 2500 diesel models actually came from the factory with AGM batteries due to their superior characteristics. AGM batteries offer several benefits:

• Improved Durability: More resistant to vibration, which is common in heavy-duty trucks.
• Maintenance-Free: No need to check water levels.
• Leak-Proof: The electrolyte is absorbed in glass mats, preventing leaks even if the casing is damaged.
• Faster Charging: Generally accept a charge more efficiently.
• Better Cold Weather Performance: Often have higher CCA ratings for their size.
• Longer Lifespan: Can last longer than flooded batteries under ideal conditions.

Given the heavy electrical demands of a modern diesel truck and the vibrations it endures, an AGM battery is often the recommended upgrade or replacement for your 2019 Ram 2500, especially for diesel models. While a bit more expensive upfront, the benefits in performance, durability, and longevity can outweigh the extra cost.

Post-installation relearn / reset procedure

After replacing the battery in your 2019 Ram 2500, it's good practice to perform a simple reset to ensure all vehicle systems recalibrate correctly. While modern vehicles are quite resilient, clearing learned parameters can prevent minor glitches.

1. Install the new battery: Ensure all connections are clean and tightened securely.
2. **Turn the ignition to the