In brief, most Honda Accord key fobs rely on a 3-volt coin-cell battery, with CR2032 being the standard. Some older or regional variants may use CR2025.
Honda has updated key designs over the years, so the exact battery type depends on the model year and the specific key style (a traditional remote vs. a proximity “smart” key). If you’re unsure, check the battery inside your fob—the marking on the current battery is your quickest guide—and consult your owner’s manual or a dealer for confirmation.
Common batteries for Accord remotes
The following covers the most typical coin-cell options you’ll encounter in Honda Accord key fobs across generations.
Key types by generation
- CR2032 — The standard 3-volt lithium coin cell used by the vast majority of modern Accord remotes (roughly 2010s through today).
- CR2025 — A slightly thinner 3-volt alternative that appears in some older or slimmer fobs and regional variants. Check the current battery in your fob to be sure.
When shopping for replacements, rely on the exact battery you find inside your fob. Different trims or markets may have different fob sizes even within the same generation.
How to replace the battery
Before you replace a Honda Accord key battery, prepare a clean, well-lit workspace and the appropriate coin-cell type. Follow these steps to safely swap in a fresh battery.
- Remove the mechanical key blade (if your fob has one) and gently separate the two halves of the fob.
- Note the orientation of the old battery, then use a small flat tool to lift it out without damaging the contacts.
- Insert a new battery of the same type (most commonly CR2032; CR2025 is possible in older variants), ensuring the + side faces the correct direction as indicated in the fob.
- Reassemble the fob and test by pressing a few buttons to confirm the remote is working.
Dispose of the old battery properly and consider recycling at a local electronics or automotive store. If your fob still doesn’t respond after replacing the battery, the issue may lie with the circuit board, not the battery.
Bottom line
For most drivers, the key fob battery for a Honda Accord is CR2032, with CR2025 appearing in some older or regional models. Always verify by inspecting the existing battery or consulting the manual, and replace with the same type to ensure proper function.
Summary
The Honda Accord key uses a 3-volt coin-cell battery, most commonly CR2032. Alternatives like CR2025 show up in certain older or regional fobs. Replacing the battery is a straightforward DIY task—open the fob, swap in the same type, and test the remote. If in doubt, check the manual or ask a dealer for guidance.