The 2020 Honda Accord key fob uses a 3-volt CR2032 lithium coin cell. This is the standard battery type for most Honda remotes from that era.
Understanding the battery type is important for proper replacement and ensuring the remote functions reliably, including lock/unlock, trunk release, and panic features. Here’s what owners need to know and how to replace it if needed.
Battery type and compatibility
The 2020 Accord’s key fob relies on a single CR2032 coin cell. While most U.S. models use this exact battery, some markets or fob variations may differ (for example, CR2025 in rare cases). For the typical U.S. 2020 Accord remote, CR2032 is correct.
Replacing the battery: step-by-step
Follow these standard steps to replace the key fob battery. The procedure is suitable for the common two-button smart key used on many 2020 Accords. If your fob looks different, consult the owner's manual or contact a dealer.
- Purchase a fresh CR2032 3V lithium coin cell and a small flat-head screwdriver or a fingernail for prying.
- Remove the mechanical key blade by sliding the release and pulling the key out of the fob.
- Gently pry apart the back cover and the front housing at the seam to access the battery.
- Note the battery orientation. The positive (+) side should face the correct contact in most fobs (often up or toward the contact terminals).
- Insert the new CR2032 with the correct polarity, ensuring it sits flat and fully engaged.
- Snap the halves back together and reinsert the mechanical key. Test the fob to confirm all functions work (lock, unlock, trunk, and panic).
After replacing the battery, if the fob still doesn’t work, double-check the battery orientation and seating. If problems persist, a dealership or automotive locksmith can diagnose potential fob circuitry issues.
Alternatives and tips
Keep a spare key fob battery on hand and test the remote regularly to catch a weakening battery before it fails. If you rely on remote start or trunk release, consider replacing the battery early to avoid inconvenient outages.
Battery life for the CR2032 in a key fob varies with use, but most owners report 1–2 years of reliable performance under normal conditions. Environmental factors such as extreme temperatures can shorten life slightly.
Summary
The essential takeaway is simple: a 2020 Honda Accord key fob uses a CR2032 3V lithium coin cell, and replacement is a straightforward DIY task with common tools. With proper handling and correct polarity, the fob resumes full function after a quick battery swap.