What type of battery is in a Honda Odyssey?

The Honda Odyssey uses a standard 12-volt lead-acid battery in the engine bay, not the high-voltage traction battery found in hybrids.

Battery basics found in most Odysseys

Powering starting, lighting and onboard electronics, the 12-volt battery in the Odyssey is separate from the vehicle’s propulsion battery. It is typically a maintenance-free, sealed lead-acid unit and sits in the engine compartment for easy access. Here are the core facts you should know.

• Type and chemistry: 12-volt lead-acid battery, usually maintenance-free and sealed (no water addition necessary).


• Function: Provides starting power and supports electrical systems; not the vehicle's main propulsion battery.


• Location: Engine bay, commonly on the driver's side near the front; accessible for replacement.


• Specifications: Capacity and cold-cranking amps (CCA) vary by model year and trim; check the battery label or owner's manual for exact numbers.


• Maintenance: Generally maintenance-free; inspect terminals for corrosion and clean as needed.

The 12-volt battery is not the high-voltage battery used to drive the wheels in hybrids or electric vehicles; for a standard Odyssey, the 12V battery handles starting and electronics only.

Model-year differences and replacement guidance

When replacing the 12-volt battery, always verify the OEM group size and cold-cranking amps specified for your model year and trim. If your Odyssey has idle-stop/start, ensure you choose a battery that supports that system. Safety comes first: disconnect the negative terminal first, then the positive, and reconnect in reverse order after installation. Consider professional installation if you’re unsure.

Before replacing, consider these practical steps to ensure a correct fit and reliable performance.

• Match the OEM group size and CCA to your model year and trim.


• Use a 12-volt maintenance-free sealed lead-acid battery unless Honda specifies an alternative.


• Follow proper safety procedures during installation and dispose of the old battery responsibly.

Concluding: For most Odyssey owners, a standard 12-volt lead-acid replacement will suffice; always confirm exact specs with the owner's manual or a dealer for your exact vehicle configuration.

Summary

In short, Honda Odysseys use a conventional 12-volt, maintenance-free lead-acid battery in the engine bay. This battery powers starting and accessories and is separate from any high-voltage propulsion battery found in hybrid systems. Always replace with the OEM-recommended group size and CCA for your specific year and trim, and seek professional help if needed.

What type of battery does a Honda Odyssey take?

The Honda Odyssey uses different battery types depending on the model year, so the correct type is either a Group Size 24F (for older models) or a Group Size 48 (H6) (for newer models). It's crucial to check your specific year, as newer models with more electronics require a larger, more powerful battery like an AGM or EFB, while older ones might use a standard flooded battery. Always verify the required size and type for your specific vehicle to ensure compatibility.
 
By model year

• Older models (approx. 2007-2017): Often use a BCI Group Size 24F battery. 
• Newer models (approx. 2018-2025): Require a larger Group Size 48 (H6) battery to handle increased electrical demands. 

By technology

• Older models: May have a standard flooded battery, but some might use an Absorbed Glass Mat (AGM) battery. 
• Newer models: Typically need an AGM or an Enhanced Flooded Battery (EFB) to power all the electronic features. 

How to confirm

• Check the old battery: The required group size is often printed on the label of the battery currently in your vehicle. 
• Use an online lookup tool: Most auto parts websites allow you to input your car's make, model, and year to find the correct battery. 
• Consult a professional: An associate at an auto parts store can help you identify the correct battery type. 

Are Odyssey batteries AGM or gel?

Like many popular spiral-wound batteries, ODYSSEY Extreme batteries employ dry cell Absorbed Glass Mat (AGM) technology to contain acid, allowing the battery to be installed even on its side.

How do I tell if my battery is AGM or regular?

You can tell if a battery is AGM or standard by checking its case for markings like "AGM," "VRLA," or "Sealed," as AGM batteries are sealed and have no removable caps, unlike standard flooded batteries which have visible vent caps to add water. You can also find the battery type in your vehicle's owner's manual or by looking up the part number on the manufacturer's website. 
Visual and physical inspection

• Look for markings: The easiest way is to check the label on the battery case for "AGM" or "Absorbent Glass Mat". Some manufacturers also use "VRLA" (Valve Regulated Lead Acid) or "Sealed" to indicate an AGM battery. 
• Check the top of the battery: 
  • AGM: A fully sealed battery will have a flat, smooth top with no removable caps or vent ports for adding water. 
  • Standard: A standard flooded battery will typically have removable caps or visible ports on the top. 
• Listen for liquid: If you can't find any markings, try to gently shake the battery. If you hear the sound of sloshing liquid, it is a standard flooded battery and not an AGM. 

This video explains the difference between AGM and standard flooded car batteries: 54sBatteries PlusYouTube · Jun 8, 2022
Other methods

• Consult the owner's manual: Your car's owner's manual will specify the recommended battery type for your vehicle. 
• Look up the part number: If you find the part number printed on the battery, you can search for it on the manufacturer's website to get its specifications. 
• Ask a professional: If you're still unsure, a mechanic or battery specialist can help you identify the battery type. 

Is the Honda battery AGM or standard?

Types of Batteries for Honda Vehicles
Honda vehicles typically require either lead-acid or AGM (Absorbent Glass Mat) batteries.