The Honda Accord key fob typically runs on a CR2032 3V lithium coin battery.
Battery size can vary by model year, trim, and market, so verify with your owner's manual or by inspecting the existing battery before replacement. This article covers common sizes, how to replace the battery, and tips for safe handling.
Common battery types used in Honda Accord key fobs
Before listing, note that the battery size can differ among generations and regional models. The following sizes are the most commonly encountered in Honda remotes.
- CR2032 — 3V lithium coin cell; the standard for most recent Accords (mid-2010s onward).
- CR2025 — 3V lithium coin cell; thinner variant used in some older remotes or specific markets.
- CR1616 — 3V lithium coin cell; rare and typically found in very early Honda keys or special editions.
When in doubt, check the battery lid or the owner's manual, or pull out the old battery to confirm the exact code before purchasing replacements.
Replacing the battery in your Honda Accord key fob
Below is a general guide to replacing the battery. Steps can vary by year and fob design, so consult your manual if you encounter differences.
- Use a small flat tool or coin to gently pry open the fob along the seam, taking care not to damage the electronics.
- Separate the two halves and locate the worn battery inside, noting the orientation (positive side typically faces up).
- Remove the old battery and dispose of it properly according to local regulations.
- Insert a fresh battery of the same type (commonly CR2032) with the correct polarity, ensuring it sits flat against the contacts.
- Reassemble the fob until it clicks shut and test the buttons to verify the function.
If the fob still fails to operate after replacement, recheck polarity, inspect for corrosion on the contacts, or have the key fob serviced by a dealer or automotive locksmith.
Safety notes and disposal
Handle lithium coin cells with dry hands, avoid short-circuiting, and never attempt to repair a damaged battery. Recycle used batteries at an approved facility or retailer that accepts small electronics batteries.
Summary
In most Honda Accord key fobs, the battery type is a CR2032 3V lithium coin cell, though some older models or regional versions may use CR2025 or CR1616. Replacing the battery is a straightforward DIY task, but always verify the correct size and polarity before installation and recycle the old battery responsibly. By following the steps outlined, you can keep your key fob functioning reliably and avoid unnecessary trips to a dealer.