The battery most Honda Accord key fobs use is the CR2032 3-volt coin cell. Some older or alternate fob designs may use CR2025 or CR1632, so verify the exact size for your model and fob type.
Across generations, Honda’s remote designs have generally relied on coin-cell batteries, with CR2032 becoming the standard for many Accord keys from the 2010s onward. This article explains which sizes are commonly found, how to replace the battery, and tips on maintenance and disposal.
Common battery sizes for Honda Accord key fobs
How to identify your fob's battery size
To determine the correct size, inspect the battery inside the fob or check the owner's manual. If you can safely open the fob, note the battery’s diameter and thickness, which should match a CR2032, CR2025, or CR1632.
- CR2032: The standard for most recent Accord key fobs (roughly mid-2010s to present). A 20 mm diameter, 3.2 mm thick coin cell.
- CR2025: Used in some older or alternative fob designs; slightly thinner coin cell that may fit certain early-generation remotes.
- CR1632: A less common, older option that can appear in very early Honda remotes; not typical for modern Accords.
Conclusion: If you’re unsure, check the current battery size in the fob or consult the dealer to confirm the correct size for your specific model year and trim.
How to replace the key fob battery
Preparation and cautions
Before starting, ensure you have the correct size battery and a small flat tool or coin to open the case. Working slowly helps prevent damage to the fob.
- Turn the fob over and locate the seam where the two halves meet. Use a coin or small flat-head screwdriver to gently pry the halves apart.
- Open the shell and locate the battery, noting which side is facing up (the plus side is typically visible and should face up when installed).
- Remove the old battery and insert the new one (CR2032 for most models, or the correct size if your fob uses CR2025 or CR1632).
- Snap the fob halves back together until they click, then test the buttons from a short distance to confirm function.
Conclusion: If the remote doesn’t work after replacement, re-check the battery orientation and ensure the halves are fully seated. Some models may require re-synchronization with the car.
Maintenance and safe disposal
Proper care and disposal help ensure reliability and environmental safety.
- Dispose of used lithium coin cells at a recycling facility or hazardous waste center; do not toss them in regular trash.
- Store spare batteries in a cool, dry place away from metal objects to prevent short circuits.
- Test the fob after replacement and consider keeping a spare battery on hand for future replacements.
Conclusion: Responsible disposal and routine checks keep your Honda Accord key functioning when you need it most.
Summary: For most Honda Accord keys, the standard replacement is a CR2032 3-volt battery. Some older or alternate remotes may use CR2025 or CR1632. Identify the correct size by inspecting the fob, follow careful replacement steps, and dispose of used batteries properly to maintain reliability and safety.