What size battery does a 2019 Honda Accord key fob take?

The 2019 Honda Accord key fob takes a CR2032 lithium coin battery.

In practice, this is the standard coin-cell battery used in many car remotes. This article explains the battery size, how to confirm it, and the step-by-step process to replace it safely and reliably.

Battery type and compatibility

The majority of 2019 Accord key fobs are powered by a CR2032 coin cell, a common 3-volt lithium battery. It’s worth noting that if your fob looks noticeably different or you’re purchasing a replacement in a region with regional variations, you should verify the exact battery size by opening the fob or consulting the owner’s manual. CR2032 batteries are widely available at supermarkets, electronics stores, auto parts shops, and online retailers.

How to identify the correct battery

A quick way to confirm is to inspect the battery inside the fob. A CR2032 is 20 millimeters in diameter and 3.2 millimeters thick. The positive (+) side is typically up when installed. If you see any different markings or the battery shape doesn’t match these dimensions, recheck the manual or ask a dealer to verify before replacing.

Replacing the battery

Replacing the battery is a straightforward DIY task. The following steps are typical for the 2019 Accord key fob, but proceed gently to avoid damaging the housing or electronics.

1. Prepare a small flat-head screwdriver or a coin, and a fresh CR2032 battery.


2. Turn the fob over and locate the seam where the two halves meet. Gently pry apart the back cover to separate the two pieces.


3. Remove the old battery, noting its orientation (positive side up).


4. Insert the new CR2032 with the correct orientation, ensuring it sits flush against the contacts and that there’s no debris.


5. Snap the two halves back together until they click into place.


6. Test the fob by locking/unlocking the doors or starting the car (if applicable) to confirm proper operation.

After replacement, if the fob still doesn’t respond, recheck the battery orientation, clean the contacts, and ensure the fob casing is properly sealed. In rare cases, some models may require reprogramming or re-pairing with the vehicle at a dealership or service center.

Maintenance and disposal tips

Dispose of spent CR2032 batteries responsibly by recycling them at local battery recycling programs or stores that accept used batteries. Keep spare batteries away from children and pets, and store them in a cool, dry place to maximize shelf life.

Summary

For a 2019 Honda Accord, the key fob typically uses a CR2032 lithium coin battery. Replacing it involves prying the fob apart, swapping in a new CR2032 with the correct orientation, and reassembling the fob. Always verify battery size if your fob looks different or if your region uses a variant, and consult the owner’s manual or dealer if you encounter issues beyond a simple replacement.

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What size battery does a 2019 key fob take?