The 2016 Honda Accord key fob uses a CR2032 3-volt lithium coin battery.
Battery type and compatibility
For Honda’s remote keys of that era, the CR2032 is the standard coin cell. It’s compact, widely available, and provides long life in the fob. If you have a variant used in a different market or a separate smart key, the battery is still typically CR2032, but you should verify by opening the fob or checking the owner’s manual.
Coin-cell sizes explained
Coin cells come in several sizes (for example CR2025, CR2032). The Accord’s fob uses the CR2032 because it offers the right balance of capacity and fit in the device’s cavity.
Replacing the battery
Before you begin, gather a small flat tool or coin and a replacement CR2032. Follow these steps to replace the battery safely.
- Remove the mechanical key blade by sliding the release latch and pulling the key out from the fob.
- Separate the back cover from the fob by prying along the seam with a small flat tool or coin.
- Take note of the battery orientation (positive side facing up) and remove the old battery.
- Insert the new CR2032 with the positive (+) side facing up.
- Snap the back cover back onto the fob and reinsert the mechanical key.
- Test the fob by pressing the lock/unlock or trunk button to ensure the battery is functioning.
If the remote still doesn’t work after replacement, the issue may be with programming, the fob itself, or the car’s receivers. In that case, consult a dealer or qualified locksmith.
Tips for reliability
Keep the fob away from extreme temperatures and moisture, and consider replacing the battery at the first sign of reduced range. Having a spare CR2032 on hand makes routine replacements quick and easy.
Summary
The 2016 Honda Accord key fob relies on a CR2032 3V lithium coin battery. Replacing it is a straightforward DIY task: pry open the fob, swap in the new battery with the correct orientation, reassemble, and test. If issues persist, seek professional assistance to check programming or hardware problems.