What Battery Your 2022 Honda Key Fob Uses
Your 2022 Honda key fob uses a CR2032 coin cell battery, a flat, round battery about the size of a dime. This is the most common battery type for car key fobs and costs between $3 and $8 at any drugstore, supermarket, or hardware store. You do not need a special Honda battery — any CR2032 will work in your fob.
The battery typically lasts three to four years with normal use. Signs that it is dying include buttons that require harder pressing, a fob that only works when held close to the car, or buttons that stop responding altogether. Replacing it takes about five minutes and requires no tools beyond what you likely have at home.
Key Takeaways
- A CR2032 coin cell battery is the correct replacement for your 2022 Honda key fob and costs a few dollars at any pharmacy or grocery store.
- The fob opens by prying gently along the seam with a flat object like a coin or butter knife — do not force it or you may crack the plastic.
- The battery sits in a metal holder with a small tab; slide the battery out toward the tab side and insert the new one the same way.
- Test all buttons before closing the fob to make sure the new battery is making contact and the fob is working properly.
Opening Your Honda Key Fob
Look at the seam that runs around the edge of your fob — this is where the two plastic halves meet. You will see a small slot or groove along this seam. Insert a flat object like a coin, butter knife, or flathead screwdriver into the slot and twist gently. The two halves will separate. If the fob is tight, work your way around the seam slowly rather than forcing one spot, which can crack the plastic.
Once the fob is open, you will see the battery sitting in a metal holder. The holder has a small tab on one side. Do not touch the battery contacts or the circuit board inside the fob — oils from your skin can interfere with the connection.
Removing and Installing the New Battery
The battery slides out of its holder toward the side with the small tab. Gently push the battery in that direction until it comes free. Do not pry it out with a sharp object, as you may damage the metal holder.
Before inserting the new battery, check that the positive side (marked with a + and usually shiny) faces up toward you. Slide the new CR2032 into the holder the same way the old one came out — toward the tab side. It should sit flat and flush in the holder. You will hear or feel a small click when it seats properly.
Testing Before You Close the Fob
Before snapping the fob back together, test each button — lock, unlock, panic, and any others your model has. Press each one two or three times and listen for the click sound that means the fob is sending a signal. If a button does not click or the fob feels dead, the battery may not be making contact. Remove it and reseat it, making sure it is fully inserted into the holder.
If the fob still does not work after reseating the battery, the battery itself may be defective. Try a different CR2032 from a different package or store. Defective batteries are rare but do happen.
Closing Your Fob and Checking the Seal
Once all buttons work, line up the two halves of the fob so the seam is even all the way around. Press them together firmly until you hear a click or feel them snap into place. The fob should feel solid and not have any gaps along the seam.
Test the buttons one more time after closing to make sure nothing shifted during reassembly. If a button suddenly stops working, open the fob again and check that the battery is still seated properly in its holder.
Common Mistakes to Avoid
Do not force the fob open — if it is not budging, you may be prying in the wrong spot. Look for the actual seam and try a different location. Forcing it can crack the plastic housing and make the fob unusable.
Do not touch the battery with wet hands or let it sit exposed to moisture. Moisture can corrode the battery and the metal contacts inside the fob. If your fob has been wet, let it dry completely before opening it.
Do not insert the battery upside down. The positive side (marked +) should face up. If the fob does not work after replacement, this is the first thing to check.
Do not assume the fob is broken if it does not work when ready after battery replacement. Sometimes the battery needs a moment to make full contact, or the old battery was so dead that the fob's memory needs to reset. Wait a few seconds and test again.
What to Do With Your Old Battery
CR2032 batteries contain small amounts of lithium and should not go in the regular trash. Most pharmacies, grocery stores, and electronics retailers have battery recycling bins near the customer service desk or entrance. Drop your old battery there at no cost. Some hardware stores also accept batteries for recycling.
If you cannot find a recycling location nearby, you can store the old battery safely in a cool, dry place until you have a chance to recycle it. Keep it away from metal objects that might short the terminals.
Frequently Asked Questions
Can I use a different battery size if I cannot find a CR2032?
No. Using a different size battery can damage the fob or cause it to malfunction. CR2032 batteries are widely available and inexpensive — any pharmacy, grocery store, or gas station carries them. If your local store is out, order one online and it will arrive within a day or two.
Why is my fob still not working after I replaced the battery?
First, check that the battery is inserted with the positive side facing up. Second, remove it and reseat it to may support it is making full contact with the metal holder. If it still does not work, try a different CR2032 battery — the first one may have been defective. If a second battery does not work, the fob itself may have a damaged circuit board or button contact.
How long does a CR2032 battery last in a Honda key fob?
Most CR2032 batteries last three to four years in a key fob, depending on how often you use it. If you press the buttons dozens of times per day, the battery may wear out faster. If you use your fob only a few times daily, it may last longer.
Is it safe to open my Honda key fob myself?
Yes. Opening the fob to replace the battery is a safe, straightforward task that does not require any special tools or training. The only risk is cracking the plastic if you force it open too hard. Take your time, pry gently along the seam, and you will have no problems.
What if I lost my key fob and need a replacement?
Contact a Honda dealership with your vehicle identification number (VIN) and proof of ownership. They can order a new fob and program it to your vehicle. You can also purchase unprogrammed fobs from third-party sellers online and have a dealership or locksmith program them for you, which is often cheaper than buying directly from Honda.