The majority of Honda Accord key fobs use a CR2032 3-volt coin cell. Some older or regional models may use CR2025; always verify by inspecting your fob or consulting the owner's manual.
In this guide, we explain which batteries are most commonly used, how to replace them safely, and what to check if the fob stops functioning after a swap.
Common battery types used in Honda Accord key fobs
Below are the battery types you’re most likely to encounter. The exact size can vary by generation and regional market, so always confirm by opening the fob or checking the owner’s manual.
- CR2032: The most common 3-volt coin cell for modern Honda Accord fobs.
- CR2025: Occasionally used in slimmer or older fob designs.
- Other small coin cells (less common): In rare or regional variants, other sizes may appear; verify with the specific vehicle’s documentation.
Because battery size depends on the generation and market, verifying the correct type before purchasing is recommended to avoid returning multiple packs to the store.
Replacing the battery in a Honda Accord key fob
Before you begin, understand that the replacement process is typically straightforward, but you should handle the fob gently to preserve seals and prevent damage.
- Determine the correct battery size by checking the current battery inside the fob or consulting the owner’s manual. If in doubt, CR2032 is the safest default choice for modern Honda fobs.
- Remove the physical key blade (if your fob has one) and prepare a clean, flat work surface.
- Gently pry apart the two halves of the fob using a small flat-head screwdriver or a prying tool designed for electronics, working along the seam.
- Identify and note the orientation of the old battery (which side is facing up). Carefully lift the old battery out with a plastic tool or non-metal implement to avoid shorting the contacts.
- If needed, clean the battery contacts with a dry cloth to remove any residue or corrosion.
- Place the new battery into the chamber with the correct polarity (positive side usually faces up, but confirm by the marking on the fob or the absent side). Ensure it sits firmly in place.
- Reassemble the fob by snapping the halves back together and reinsert the key blade if removed. Test the fob by pressing lock/unlock and, if available, the trunk or panic buttons.
If the fob still doesn’t respond after replacement, re-check the battery orientation and contacts, reseal the halves properly, and consider trying a spare key fob if available. A non-responsive fob could also indicate a need for reprogramming or a deeper electrical issue.
Tips for safety and reliability
Polarity and handling
Always insert the new battery with the correct polarity. Replacing a coin cell with the wrong orientation can damage the fob’s circuitry and create a short.
Disposal and storage
Dispose of old batteries according to local regulations for lithium coin cells. Store spare batteries in a cool, dry place away from metal objects that could cause shorts.
Summary
For most Honda Accord owners, the standard replacement battery is the CR2032 3-volt coin cell, with CR2025 appearing in some older or regional fobs. Always verify the exact size by inspecting the existing battery or consulting the owner’s manual. Replacement is typically a quick process involving careful opening, correct orientation of the new cell, and reassembly. If issues persist after a swap, consider testing with a spare fob, checking for mechanical damage, or seeking dealer assistance after attempting the straightforward replacement steps.
What battery does my 2020 Honda Accord key fob take?
Take out your dead. Battery. Make sure you place your new one positive side facing upward just like that squeeze these two halves back. Together want to make sure you've got your red light there.
What battery is in a Honda Accord key fob?
Out. Now bring in the new battery. When you put it into the key fob. Place it into the stationary clips. And push it into the flexible clips where they will accept.
Can I use CR2032 instead of CR2025 in a key fob?
Fit and Functionality:
However, if it's too tight or prevents the case from closing properly, it might be better to stick with the CR2025 to avoid damaging the key fob. In summary, you can use a CR2032 instead of a CR2025 as long as it fits properly in the battery compartment of your car key.
How to replace Honda key fob battery CR2032?
So I'll put the screwdriver. In twist. It you should hear it start to open up and you can see the key fob is now open you can pull the top off set to the side.