The 2009 Honda Accord key fob uses a CR2032 3-volt lithium coin battery. This is the standard battery type for most Honda remotes from that era, and replacements are widely available.
Battery type and compatibility
The CR2032 is a 3V lithium coin cell that powers the remote. While CR2032 is the typical choice for US-market 2008–2010 Accord remotes, some regional variants or earlier/alternative trims may use a similar coin cell such as CR2025. If in doubt, check the old battery for the exact designation or consult the owner's manual.
Common sizes in Honda remotes
For the 2009 Accord, CR2032 is the standard. If you encounter a different marking, verify before purchasing to ensure you get a battery that fits correctly.
Replacement steps
To replace the battery, you’ll need a fresh CR2032 and a small flat tool. Follow these steps carefully to avoid damaging the key fob.
- Remove the mechanical key blade from the fob by sliding the release and pulling it out.
- Use a small flat tool or coin to gently pry apart the two halves of the fob along the seam.
- Take note of the battery’s orientation and remove the old battery.
- Insert the new CR2032 with the plus (+) side facing up, seating it flat and centered.
- Snap the fob halves back together, reinsert the mechanical key, and test the remote to ensure all buttons function.
After replacement, dispose of the old battery properly according to local recycling guidelines. If the remote still doesn’t work after replacing the battery, the issue may lie with the transmitter or other internal components, requiring professional service.
Where to buy and disposal
CR2032 batteries are widely available at auto parts stores, electronics retailers, drugstores, and online retailers. When discarding spent batteries, use designated recycling options rather than trash, as many communities offer battery recycling programs or drop-off centers.
Summary
For a 2009 Honda Accord key fob, the battery is a CR2032 3-volt lithium coin cell. Replacing it involves opening the fob, swapping in a fresh CR2032 with the correct orientation, and reassembling the unit. Batteries are easy to find and recyclable; if issues persist after replacement, seek professional assistance to diagnose potential transmitter or fob problems.