2020 International LT Battery Replacement and Specifications

Quick Answer

• BCI Group Size: Group 31 (typically 3-4 batteries in parallel)
• CCA Rating: 925-1000 CCA per battery (for a total of 2775-4000 CCA with multiple batteries)
• Reserve Capacity: 180-200 minutes per battery
• AGM vs. Flooded: Flooded lead-acid is standard, but AGM is an excellent upgrade for increased durability and longer life.
• Terminal Layout: Typically SAE posts with threaded studs for heavy-duty applications.
• Physical Dimensions: Group 31 (L: 13", W: 6.8", H: 9.4")
• Dual-Battery Setup: The 2020 International LT generally utilizes a multi-battery setup (3-4 batteries) wired in parallel to meet the high power demands of a heavy-duty truck.

Replacement Battery Options

Finding the right batteries for your 2020 International LT is crucial for reliable starting and powering all your onboard accessories. Here are some popular heavy-duty Group 31 battery options:

• Interstate: MT31 (Flooded), MTZ-31 (AGM)
• DieHard: 31PLT (Flooded)
• Optima: Optima has limited heavy-duty Group 31 options, but models like the YellowTop D31A could be used in specific configurations, if available, offering deep cycle and starting power. Availability may vary.
• Odyssey: 31-PC2150S (AGM)
• ACDelco: 31P-950 (Flooded)

AGM vs. Flooded — Which Does This Vehicle Need?

The 2020 International LT comes standard with flooded lead-acid batteries. These are a cost-effective and proven technology that works well for the truck's demanding electrical system. They require occasional maintenance, such as checking and topping off electrolyte levels.

However, upgrading to Absorbent Glass Mat (AGM) batteries offers several advantages, especially for a heavy-duty truck like the International LT:

• Increased Durability: AGM batteries are more resistant to vibration, which is a significant factor in commercial trucking. This leads to a longer lifespan.
• Maintenance-Free: AGM batteries are sealed and do not require watering.
• Deep Cycle Capabilities: Many AGM batteries offer better deep cycling capabilities, which is beneficial for powering auxiliary systems and preventing premature wear from repeated deep discharges.
• Faster Recharging: AGM batteries often accept a charge faster than flooded batteries.

While AGM batteries have a higher initial cost, their enhanced performance and longevity can provide long-term value, fewer roadside issues, and lower overall cost of ownership for a commercial vehicle.

Post-Installation Relearn / Reset Procedure

When replacing the batteries in your 2020 International LT, it's important to follow proper procedures to ensure all systems function correctly. Due to the sophisticated electrical systems in modern trucks, a simple disconnect and reconnect might necessitate some relearning.

After installing new batteries:

1. Verify Connections: Double-check that all battery terminals are clean and securely fastened. Loose connections can cause intermittent electrical problems and system malfunctions.
2. Initial Start-Up: Start the truck and let it idle for a few minutes. Observe the dashboard for any warning lights.
3. Engine ECU / ECM Reset (if necessary): In some cases, disconnecting the batteries can cause the Engine Control Unit (ECU) or Engine Control Module (ECM) to lose some learned parameters. While many modern heavy-duty ECUs can relearn these parameters on their own during normal operation, if you experience anything unusual (e.g., rough idle, unusual shifting patterns, or minor performance issues) after battery replacement, it might be beneficial to perform a manual reset or allow the vehicle to run through a few drive cycles. Refer to your International LT owner's manual or a specialized service manual for specific procedures or consult with an authorized International service center. Some systems, like the engine brake or transmission, might benefit from an idle relearn procedure.
4. Cab Electronics: Check that all cab electronics, including the radio, navigation, and climate control, are functioning correctly. You may need to reset radio presets or navigation settings.
5. Fault Codes: Use a diagnostic tool to check for any stored or active fault codes. Clear any codes that may have been triggered by the battery disconnect. If new codes appear, diagnose them accordingly.

Signs of a Failing Battery

Recognizing the symptoms of a failing battery can prevent unexpected downtime for your 2020 International LT:

• Slow Cranking: The engine turns over slowly when starting, especially in cold weather.
• Dim Lights: Headlights and interior lights appear dim when the engine is off.
• Warning Lights: A battery warning light or "check charging system" message on the dashboard.
• Corrosion: Excessive corrosion around the battery terminals.
• Swelling or Bulging Battery Case: A clear sign of internal damage or overcharging.
• Electrical Gremlins: Intermittent issues with electronic accessories, such as the radio, navigation, or power windows.
• Frequent Jump Starts: Needing to jump-start the truck regularly.

Common Battery Issues for This Generation

Heavy-duty trucks like the 2020 International LT place significant demands on their battery systems. Common issues often stem from:

• Vibration: Constant vibration from road conditions can degrade internal battery components, especially in flooded batteries. AGM batteries are more resilient to this.
• Parasitic Draws: Even when the truck is off, various electronic systems can draw power from the batteries, leading to discharge, especially during extended downtime. Properly identifying and mitigating parasitic draws is crucial for battery longevity.
• Charging System Malfunctions: Issues with the alternator, voltage regulator, or battery cables can lead to undercharging or overcharging, both of which reduce battery life.
• Deep Cycling: Extensive use of onboard accessories (e.g., sleeper climate control, auxiliary power units) without adequate charging can lead to deep discharges, which are detrimental to standard flooded batteries. Using deep cycle-capable batteries or ensuring proper charging is essential.
• Corrosion: Inadequate maintenance or loose connections can lead to corrosion at the terminals, increasing resistance and hindering battery performance.
• Heat: High under-hood temperatures can accelerate battery fluid evaporation and internal degradation, especially for flooded batteries.

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