The correct battery is a CR2032 3V lithium coin cell. This is the standard battery used in most 2018 Honda CR-V key fobs.
Battery Type and Confirmation
For the 2018 Honda CR-V, the replacement battery typically required by the key fob is a CR2032. If you’re unsure, you can confirm by checking the battery you remove or referencing the owner’s manual for your specific trim and fob variant.
What to look for
Below is the commonly used battery type for this fob:
- CR2032 3V lithium coin cell
Using the correct size ensures proper fit and electrical contact, and avoids damage to the fob.
How to Replace the Battery
Follow these steps to replace the battery safely and correctly:
- Remove the mechanical emergency key from the fob by sliding the release mechanism and pulling the key out.
- Locate the small seam or notch on the edge of the fob and use a flat-head screwdriver or a plastic opening tool to gently pry the shell apart.
- Carefully separate the two halves of the fob and identify the battery inside.
- Note the orientation of the old battery (usually the "+" side faces up) and remove it using a non-metal tool or gentle prying.
- Insert the new CR2032 battery with the correct polarity (+ up in most Honda fobs) and reassemble the fob.
- Test the key fob by locking/unlocking the doors or pressing the panic button to ensure it’s functioning properly.
If the fob still doesn’t respond after replacement, consider cleaning the battery contacts with a dry cloth and rechecking the orientation. If issues persist, a dealer or automotive locksmith can verify the fob’s circuitry.
Where to Buy and Tips
Where to purchase and practical tips for getting the right battery:
- Auto parts stores (e.g., AutoZone, Advance Auto Parts, O'Reilly) typically stock CR2032 batteries and can help verify fit.
- Pharmacies and big-box retailers often carry CR2032 batteries for consumer electronics and may have them in stock.
- Online retailers (e.g., Amazon, manufacturer websites) offer CR2032 batteries in various quantities and may include expedited shipping.
Tips: store a spare CR2032 in a dry place, handle the battery with clean hands to avoid contamination, and avoid touching the battery’s metal surfaces with bare skin. If your fob has an unusual design or a newer variant, consult your vehicle’s manual or contact a Honda dealer for model-specific guidance.
Summary
For a 2018 Honda CR-V key fob, use a CR2032 3V lithium coin cell. Replacing the battery is a quick, DIY-friendly task: pry open the fob, swap in the new battery with the correct polarity, reassemble, and test. If problems persist, seek professional assistance to rule out fob programming or circuit issues. Keeping a spare CR2032 on hand is a useful precaution for uninterrupted key fob performance.