The 2018 Honda Accord key fob uses a CR2032 3-volt lithium coin battery.
Battery size and compatibility for the 2018 Accord key fob
That coin-cell size is standard for the Accord’s remote, powering locking, unlocking, and other functions. If you want to confirm, open the fob and look for the battery type stamped near the battery compartment; the CR2032 is the typical choice for this model year.
How to replace the key fob battery
Follow these steps to replace the battery in the standard 2018 Accord key fob.
- Using a small flat-head screwdriver or a coin, twist or pry apart the fob along the seam to separate the two halves.
- Carefully lift out the old battery from its holder.
- Insert a new CR2032 battery with the positive (+) side facing up, aligning it with the contacts.
- Snap the fob halves back together until they click into place.
- Test the remote by pressing a button (lock/unlock) to ensure it’s working.
Dispose of the old battery at a proper battery recycling location. If the remote still doesn’t work after replacement, inspect the battery contacts for corrosion or try a fresh CR2032.
Variant notes
Some trims or regional versions might differ slightly in how the fob is opened, but the battery type remains CR2032 in most 2018 Accord key fobs. If in doubt, consult your owner’s manual or contact a Honda dealer for model-specific guidance.
Summary
In short, the 2018 Honda Accord key fob uses a CR2032 3V coin-cell battery. Replacement is a quick DIY task that involves prying the fob apart, swapping in a new CR2032 with the correct orientation, reassembling, and testing the remote. Keep spare batteries on hand and recycle the old one responsibly.