2020 Ford F-350 Super Duty Battery Size & Group

Quick answer

• BCI Group Size: Group 65
• Cold Cranking Amps (CCA): 750 CCA for the 6.2L V8 and 7.4L V8 gas engines; 850 CCA for the 6.7L V8 diesel engine.
• Reserve Capacity (RC): Approximately 150 minutes.
• AGM vs. Flooded: Both AGM and flooded batteries are compatible. However, due to the high electrical demands of modern Super Duty trucks, an AGM battery is highly recommended.
• Terminal Layout: Left-hand positive terminal.
• Physical Dimensions (approximate): 12.1" L x 7.5" W x 7.6" H
• Dual-Battery Setup: The 6.7L Power Stroke diesel engine option comes with a dual-battery setup, requiring two Group 65 batteries.

Replacement battery options

When it comes to replacing the battery in your 2020 F-350, you have several excellent options. Here are a few of the most popular choices:

• Interstate: MTP-65 (flooded) or MTX-65 (AGM)
• Optima: YellowTop DH6 (AGM)
• DieHard: Platinum AGM 65
• Odyssey: 65-PC1750T (AGM)
• ACDelco: 65AGMHR (AGM)

AGM vs flooded — which does this vehicle need?

While the 2020 F-350 can use either a traditional flooded lead-acid battery or a more modern Absorbent Glass Mat (AGM) battery, an AGM is the superior choice. The Super Duty's sophisticated electronics, powerful onboard accessories, and features like the optional winch put a significant strain on the electrical system. AGM batteries are better equipped to handle these deep-cycling demands and are also more resistant to vibration, a key consideration for a heavy-duty truck. They are also spill-proof and can be mounted in any orientation.

Post-installation relearn / reset procedure

After replacing the battery in your 2020 F-350, a battery relearn procedure is necessary to ensure the Battery Management System (BMS) is properly calibrated to the new battery. Failure to do so can result in overcharging or undercharging, which will shorten the life of your new battery. The relearn procedure is as follows:

1. With the vehicle off, connect the new battery.
2. Start the engine.
3. Allow the engine to run for at least 8 hours.

Alternatively, a scan tool can be used to perform a BMS reset.

Signs of a failing battery

A failing battery can manifest in several ways. The most obvious is a no-start condition. However, there are often warning signs before a complete failure:

• Slow engine crank: If the engine turns over more slowly than usual, it's a strong indication of a weak battery.
• Dimming lights: If you notice the headlights or interior lights dimming, especially at idle, it could be a sign of a failing battery.
• Warning lights: The battery light or check engine light may illuminate on the dashboard.
• Corrosion: Visible corrosion on the battery terminals can inhibit the flow of electricity.
• Swollen battery case: If the battery case appears swollen or bloated, it's a sign of internal damage and the battery should be replaced immediately.

Common battery issues for this generation

The 2017-2022 generation of Ford Super Duty trucks are known for their high electrical demands, which can lead to premature battery failure if an inadequate battery is used. The BMS can also be a source of issues if it is not properly reset after a battery replacement. Finally, parasitic drains from aftermarket accessories can also lead to battery problems.

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