2016 Volvo VNL Battery Replacement and Specifications

Quick answer

• BCI Group Size: Group 31 (typically two batteries in series/parallel for 24V starting and 12V accessories)
• CCA Rating (per battery): 925-1150 CCA
• Reserve Capacity (per battery): 170-200 minutes
• AGM vs. Flooded: Primarily flooded lead-acid from the factory, but AGM is an excellent upgrade for durability and cycling. Check vehicle specifications for charging system compatibility.
• Terminal Layout: Typically top post, with L (left) or R (right) positive posts depending on battery orientation and manufacturer.
• Physical Dimensions (Group 31): Approximately 13" L x 6.8125" W x 9.4375" H
• Dual-battery setup: Yes, standard for the VNL, often in a series-parallel configuration for 24V starting and 12V accessory draw.

Replacement Battery Options

• Interstate: 31-MHD (Flooded), 31-AGM (AGM)
• DieHard: Group 31 Commercial (Flooded), Platinum Group 31 (AGM)
• Odyssey: ODP-AGM31 (AGM)

AGM vs. Flooded — Which does this vehicle need?

The 2016 Volvo VNL typically came equipped with flooded lead-acid batteries from the factory. These are a cost-effective and reliable option for general use. However, given the demanding nature of commercial trucking, especially with auxiliary power units (APUs), hotel loads, and numerous electronic systems, AGM (Absorbent Glass Mat) batteries offer significant advantages.

AGM batteries are more resistant to vibration, can withstand deeper discharge cycles without damage, and recharge faster than flooded batteries. They are also sealed, spill-proof, and maintenance-free. While they represent a higher initial investment, their increased lifespan and performance in demanding applications can make them a more economical choice in the long run. It's crucial to ensure your VNL's charging system is compatible with AGM batteries, particularly if you have an aftermarket charging system or APU, though modern alternators generally handle both types well.

Post-installation relearn / reset procedure

For a 2016 Volvo VNL, the battery replacement procedure is generally straightforward, but some systems may require a brief reset:

1. Safety First: Ensure the ignition is off, and disconnect any shore power, APUs, or external chargers. Always disconnect the negative battery terminals first, followed by the positive.
2. Replacement: Carefully remove the old batteries and install the new ones, ensuring all connections are clean and secure. Connect positive terminals first, then negative.
3. Basic Power Cycle: After connecting the new batteries, turn on the ignition and allow all systems to power up. You might notice some dashboard warning lights initially; these should extinguish once the vehicle runs for a short period.
4. Idling: Allow the truck to idle for 10-15 minutes. This allows the Engine Control Unit (ECU) and other modules to re-learn their parameters and sensor readings.
5. Window and Radio Presets: You may need to reset radio presets, clock, and potentially power window one-touch functions if equipped. Refer to your VNL owner's manual for specific instructions on these minor adjustments.
6. Diagnostic Trouble Codes (DTCs): In rare cases, a prolonged power loss might trigger "low voltage" or "battery disconnect" related trouble codes. These are typically "soft codes" and should clear themselves after several drive cycles. If persistent codes appear, further diagnosis with a Volvo-compatible scan tool would be necessary.

Signs of a failing battery

Being aware of the signs of a dying battery can save you from unexpected downtime:

• Slow Cranking: The most common sign. The engine turns over slowly, especially on cold mornings.
• Dim Lights/Electronics: Headlights, dash lights, or interior lights appear dim when the engine is off.
• Warning Lights: A battery or charging system warning light illuminates on the dashboard.
• Corrosion: Excessive corrosion around the battery terminals can indicate a poor connection or outgassing from a failing flooded battery.
• Swollen Battery Case: The battery case appears swollen or bulging, often a sign of internal damage or overcharging.
• Frequent Jumps/Short Lifespan: Needing frequent jump starts or if the battery is only a couple of years old and already struggling.

Common battery issues for this generation

While the 2016 Volvo VNL is a robust truck, certain battery-related issues can arise:

• Vibration Damage: Commercial trucks experience significant vibration, which can shorten the lifespan of standard flooded batteries. Upgrading to AGM or ensuring robust battery hold-downs is crucial.
• "Hotel" Loads: The extensive electrical demands from APUs, refrigerators, microwaves, and other cabin accessories when the engine is off can deeply discharge batteries, especially if not properly maintained or if the charging system isn't optimized for these loads.
• Parasitic Draws: Aftermarket accessories or electrical issues can lead to parasitic draws, slowly draining batteries even when the truck is off, leading to unexpected dead batteries.
• Charging System Issues: Faulty alternators or voltage regulators can either undercharge (leading to sulfation) or overcharge (leading to premature failure) batteries. Regular charging system checks are vital.
• Corrosion and Poor Connections: Due to exposure to the elements and vibration, battery terminals and cables can corrode or loosen, leading to poor conductivity and charging problems.

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