What Size Battery a Honda Accord Key Fob Uses

Most Honda Accord key fobs use a CR2032 3V coin-cell battery, especially on recent models (roughly 2013–2025). Some older Accords—particularly those with the earlier, integrated key-and-remote “remote head” style—often use a smaller CR1616, and certain late-1990s/early-2000s remotes may use a CR2025. The exact battery is stamped on the old cell and listed in your owner’s manual, so check to confirm before you buy.

Quick reference by model years and fob styles

The following guide summarizes common battery types used across Accord generations. Because trims and fob styles can vary within a generation, verify against your specific vehicle’s manual or the number printed on the old battery.

• 2023–2025 (11th gen, Smart Entry/push-button start): CR2032
• 2018–2022 (10th gen, Smart Entry): CR2032
• 2013–2017 (9th gen): Mostly CR2032 for Smart Entry; some trims with a remote-head key may use CR1616
• 2008–2012 (8th gen, integrated remote-head key): Typically CR1616
• 2003–2007 (7th gen, separate remote): Typically CR1616
• 1998–2002 (6th gen, separate remote): Often CR2025 (verify on the battery or in the manual)

Use this as a starting point. The surest method is to open your fob and read the marking (e.g., “CR2032”) on the existing coin cell.

How to confirm your battery size

Before purchasing a replacement, use one or more of these quick checks to make sure you get the right coin cell.

• Check the owner’s manual under “Keys and Remote” or “Smart Entry System.”
• Look for a label on the back of the fob or inside the case specifying the battery type.
• Open the fob and read the stamping on the coin cell itself (e.g., CR2032, CR1616, CR2025).
• Note the fob style: slim Smart Entry fobs (push-button start) are almost always CR2032; older, thicker remote-head keys often use CR1616.
• If in doubt, bring the fob or old battery to an auto parts store; they can match it on the spot.

These steps prevent a mismatch and save an extra trip—especially important because CR2032 and CR2025 look similar but differ in thickness and capacity.

Typical replacement steps (most Accord fobs)

The process is straightforward and similar for most Honda fobs. Always consult your manual for model-specific instructions.

1. Remove the mechanical key: Slide the release and pull out the metal key.
2. Pry the case: Insert the key tip (or a small flat screwdriver) into the seam and gently twist to open the fob.
3. Note battery orientation: Observe the + (positive) side before removal.
4. Swap the coin cell: Replace with the correct 3V coin battery (commonly CR2032), matching orientation.
5. Snap the case closed: Press evenly around the edges until it clicks.
6. Test: Stand near the car and lock/unlock; for Smart Entry, verify proximity unlock and engine start.

No reprogramming is typically required after a simple battery change; if functions don’t return, reseat the battery or try a fresh cell.

Signs your key fob battery is low

Watch for these indicators that it’s time to replace the coin cell in your Accord’s fob.

• Reduced range—needing to stand closer to lock/unlock
• Intermittent button response or delayed door unlock
• Dashboard or cluster message such as “Keyless Remote Battery Low”
• Smart Entry not recognizing the fob unless held right to the start button

Replacing the coin cell promptly helps avoid getting locked out or losing push-button start convenience at an inconvenient time.

Good-to-know details

These quick facts help you choose correctly and extend fob life.

• Battery types: CR2032, CR1616, and CR2025 are 3V lithium coin cells; match the exact code, not just the voltage.
• Avoid rechargeable “LIR” coin cells—they have different voltages and behavior.
• Quality matters: Name-brand cells (Panasonic, Energizer, Duracell, Sony) last longer and are less prone to early failure.
• Dispose properly: Recycle used coin cells; keep them away from children and pets as they are hazardous if swallowed.

Using the correct, high-quality battery and installing it carefully ensures reliable locking, unlocking, and starting for years.

Summary

For most Honda Accord models—especially 2013 through 2025—the key fob uses a CR2032 3V coin-cell battery. Older Accords may use CR1616, and some late-1990s/early-2000s remotes use CR2025. Confirm by checking your manual or reading the code on the old battery, then replace it following the simple steps above.

Do all Honda key fobs take the same battery?

Almost every Honda key uses the same three-volt battery.

Is the battery in a Honda key fob 2032 or 2025?

Identifying the Right Battery
Most Honda key fobs use a CR2032 battery, but it’s always a good idea to check your owner’s manual or look at the old battery to confirm.

What size battery for key fob Honda Accord?

The most common Honda Accord key fob battery is the CR2032 lithium coin battery, but some older models may use a CR1616 or CR1620 battery. To be sure, check your owner’s manual or visually inspect the old battery after opening the fob to determine the correct size and type for your specific year and model.
 
This video shows how to replace the battery in a Honda key fob: 1mMikesCarInfoYouTube · Feb 5, 2024
How to Check Your Battery Size

1. 1. Locate the hidden key: On the back of the key fob, there’s a latch to release the physical key. 
2. 2. Open the case: Use the released key to pry open the seam of the key fob. Alternatively, you can use a small flathead screwdriver or your thumbnail to carefully pry the case apart at the seam. 
3. 3. Identify the battery: Once the case is open, the old battery will be visible. Note its size and type. 
4. 4. Purchase the correct battery: Take the information from the old battery to the store or purchase the correct replacement online. 

Common Honda Accord Battery Types

• CR2032: This is a very common battery for many modern Honda key fobs, including those for the 2013 and newer Accord models. 
• CR1616 / CR1620: Some older Honda Accords, such as those from the 2003-2013 model years, may use a smaller CR1616 or CR1620 battery. 

This video shows the process of opening the key fob and replacing the battery: 57sPYR Automotive YouTube · Feb 6, 2023

What battery goes in my 2015 Honda Accord key fob?

The battery type for a 2015 Honda Accord key fob is a CR2032 lithium coin cell battery. This 3-volt battery is a common size and can be found at most hardware stores, automotive parts stores, and online retailers.
 
This video demonstrates how to replace the battery in a 2015 Honda Accord key fob: 37sSgt LocksmithYouTube · Jan 8, 2024
How to check and replace the battery:

1. Locate the physical key: Slide the release switch to remove the metal emergency key from the fob. 
2. Pry open the fob: Use the end of the emergency key or a small flathead screwdriver in the notch to gently pry the back of the fob open. 
3. Identify the battery: The old battery will be visible, likely a CR2032 coin cell. 
4. Replace the battery: Note the orientation of the old battery, then pop the new CR2032 into place with the positive side (usually the side with writing) facing up. 
5. Reassemble: Snap the fob back together and reinsert the metal key. 

You can watch this video to learn how to open the key fob and change the battery: 1mMikesCarInfoYouTube · Feb 5, 2024