The key fob for a 2008 Honda Accord uses a CR2032 3-volt coin-cell battery.
Battery type and where to find it
The vast majority of 2008 Accord remotes use a CR2032 coin cell. This is a 3V lithium battery with a standard 20 mm diameter and about 3.2 mm thickness. If you’re unsure, you can check the current battery's imprint or consult the owner’s manual for the exact specification. Replacements are widely available from auto parts stores, electronics retailers, and many pharmacies.
How to replace the battery
Follow these steps to replace the battery in most 2008 Honda Accord key fobs:
- Remove the mechanical key from the fob to access the seam.
- Use a small flat tool to gently pry the fob halves apart along the seam, taking care not to damage the plastic or electronics.
- Note the orientation of the old battery (which side is up) before removing it.
- Insert the new CR2032 coin cell with the correct polarity (positive side up in most cases).
- Reassemble the fob halves and reinsert the mechanical key.
- Test the remote to ensure the locks, trunk, and any other functions operate properly.
Concluding: After replacing the battery, avoid touching the battery contacts with dirty fingers, keep the fob dry, and steer clear of high heat. If the remote still doesn’t work after replacement, the issue may lie elsewhere, such as a worn key fob circuit or the car's receiver.
Notes for different fobs or regional variations
Some markets or model variations might use a slightly different fob design, but the CR2032 is the most common size for the 2008 Accord key. If your fob feels thicker or you find yourself replacing a different-sized coin cell, check the underside of the old battery for the exact code (for example, CR2025 or CR2032) or refer to your vehicle’s manual.
Summary
The standard battery for a 2008 Honda Accord key fob is a CR2032 3-volt coin cell. Replacement is a straightforward DIY task; confirm the correct size on the existing battery or in the owner's manual, then replace and test the remote.