Most Honda key fobs in current production use a 3-volt CR2032 lithium coin cell. A few older or special remotes may use CR2025 or other sizes, so verify by checking the fob or the owner’s manual before purchasing a replacement.
Common battery types for modern Honda key fobs
The vast majority of current Honda remotes rely on a CR2032 battery, but a minority of older designs used CR2025. This quick guide highlights the sizes you are most likely to encounter.
- CR2032 — 3V lithium coin cell. This is the standard size for most modern Honda key fobs, including many recent models.
- CR2025 — 3V lithium coin cell. Some older or specialty remotes may use this smaller size.
- Other sizes are uncommon and using an incorrect size can damage the fob or prevent it from working.
To confirm the correct size for your vehicle, inspect the battery inside the fob (the size is often printed on the battery itself) or consult the owner's manual. If in doubt, check with a Honda dealer or service guide for your model year.
Notes by model and year
Software and hardware changes over generations can shift battery sizes. Always verify for your specific model year and market to avoid mis-sizing a replacement.
How to replace a Honda key fob battery
Replace the battery using a careful, step-by-step approach. The process is similar across most Honda keys, but some variants may have slight differences.
- Identify the correct battery size by inspecting the existing battery or checking the manual.
- Gather tools: a small flat-head screwdriver or coin, and a fresh CR2032 (or CR2025 if your model specifies that size).
- Gently pry open the back cover along the seam, being careful not to damage the casing or internal electronics.
- Remove the old battery, noting the orientation of the + side.
- Insert the new battery in the same orientation, ensuring it sits flat and makes proper contact.
- Reassemble the fob and test by pressing buttons to confirm the remote is functioning.
Some fobs may require a tiny screw or an alternate cover design. If you encounter resistance, consult the owner's manual, contact a dealer, or visit a locksmith who specializes in car keys.
Tips for safe handling and disposal
Recycle used lithium batteries at an appropriate facility. Do not dispose of them with regular trash, and avoid shorting the contacts when handling an exposed battery.
Where to buy and how much to expect
Replacement batteries for Honda key fobs are widely available at auto parts stores, electronics retailers, and online. Prices are typically modest, but can vary by battery size and retailer. Always confirm the exact size before purchasing.
Summary
In short, the standard battery for most modern Honda key fobs is a 3V CR2032 coin cell. Always verify by inspecting the fob or consulting the owner's manual, as a few older or market-specific remotes may use CR2025 or another size. Replacement is straightforward with the right tools and battery, and proper disposal is important for environmental and safety reasons.