Open the key fob case to access the battery
Most Chrysler key fobs split open along a seam running around the edge. Look for a small slot or notch on the side of the fob—this is where you insert a flat tool to pry the two halves apart. A flathead screwdriver, coin, or plastic pry tool works well. Insert the tool gently into the slot and twist slightly; the case should pop open without force.
Once the fob is open, you will see the battery sitting in a plastic holder. Note which side faces up—the positive (+) side or negative (−) side. Take a photo with your phone if you are unsure; you will need to install the new battery the same way. Some fobs have a small circuit board attached to one half of the case; be careful not to bend any metal contacts when you open it.
Key Takeaways
- Chrysler key fob batteries are usually CR2032 or CR2025 coin cells, which cost $3 to $8 at drugstores, supermarkets, or online retailers.
- Open the fob by inserting a flathead screwdriver or coin into the seam and twisting gently until the two halves separate.
- Note the battery orientation before removing it, and install the new battery with the same side facing up.
- Test the fob when ready after reassembly by pressing each button while standing near your vehicle to confirm all functions work.
Identify the correct battery type and size
Chrysler key fobs typically use a CR2032 or CR2025 coin cell battery. The battery itself will be stamped with its model number on the flat side. If you cannot read the number clearly, check your vehicle's owner manual—it lists the exact battery type for your fob. You can also take a photo of the old battery and show it to a cashier at a pharmacy or electronics store, and they will match it for you.
CR2032 and CR2025 batteries are not interchangeable, even though they look similar. CR2032 is slightly thicker. Installing the wrong size can prevent the fob from closing properly or cause poor electrical contact. Buy the exact type that came out of your fob. These batteries are inexpensive and widely available at drugstores, supermarkets, hardware stores, and online.
Remove the old battery and clean the contacts
Once the fob is open, gently lift the old battery out of its plastic holder. If it is stuck, use a plastic tool or your fingernail to nudge it—avoid metal tools that could scratch the contacts inside the fob. Set the old battery aside.
Before inserting the new battery, wipe the metal contacts inside the fob with a dry cloth or cotton swab. Over time, corrosion or dust can build up on these contacts and prevent the battery from making good electrical contact. A quick wipe takes only a few seconds and often solves problems where the fob stops working even with a fresh battery. Do not use water or cleaning solution; dry contact only.
Insert the new battery with correct orientation
Place the new battery into the plastic holder with the positive (+) side facing the same direction as the old battery did. The positive side is usually the flat, stamped side; the negative (−) side is the rounded back. If you took a photo earlier, check it now. Press the battery down gently until it sits flat in the holder and makes contact with the metal terminals on both sides.
Do not force the battery into place. It should sit snugly but without resistance. If the fob case does not close smoothly after you insert the battery, the battery may be upside down or the circuit board may be pinched. Open the fob again and check the orientation and alignment of all parts before closing it.
Reassemble the fob and test all buttons
Align the two halves of the fob so the seam matches up evenly on all sides. Press them together firmly until you hear or feel a click. The fob should close with a solid snap, not a loose fit. If it does not close completely, open it again and check that the battery is seated properly and no wires or circuit board parts are in the way.
Stand near your vehicle and test each button on the fob—lock, unlock, trunk release, or panic button, depending on your model. Press each one several times to confirm it responds. Walk to your vehicle and try locking and unlocking the doors from a distance to verify the fob communicates with the car. If any button does not work, open the fob again, remove the battery, clean the contacts a second time, and reinstall the battery, checking the orientation once more.
What to do if the fob still does not work after battery replacement
If the fob still does not respond after you have installed a fresh battery and tested it, the problem is usually not the battery itself. The most common cause is corrosion on the metal contacts inside the fob. Remove the battery again and clean the contacts more thoroughly with a cotton swab slightly dampened with white vinegar or rubbing alcohol. Let the fob dry completely before reinserting the battery.
If the fob still does not work, the circuit board or internal switch may be damaged. This is not a repair you can do at home. Contact a Chrysler dealership or a local automotive locksmith for a replacement fob. Dealerships can order a new fob and program it to your vehicle; locksmiths often offer the same service at a lower cost. Bring your vehicle keys and proof of ownership when you visit.
Frequently Asked Questions
Where can I buy a CR2032 or CR2025 battery?
These batteries are sold at drugstores like CVS and Walgreens, supermarkets, hardware stores, Best Buy, and online retailers like Amazon. They typically cost $3 to $8 per battery. Some stores sell them in multipacks if you want spares. You do not need a prescription or membership to buy them.
Can I use a rechargeable battery in my key fob?
No. Rechargeable batteries have different voltage output than standard coin cells and may not work reliably in a key fob. Stick with a fresh, single-use CR2032 or CR2025 battery. The battery will last one to three years depending on how often you use the fob.
What if I drop the battery or it gets wet?
If the battery got wet, dry it completely with a cloth before installing it. If you dropped it on a hard surface, inspect it for cracks or dents. A slightly dented battery may still work, but a cracked one should not be used. When in doubt, buy a new battery—they are inexpensive and safer than risking a damaged cell.
Do I need to reprogram my key fob after changing the battery?
No. Changing the battery does not erase the fob's programming. Once you install the new battery and close the fob, it should work when ready without any reprogramming steps. If it does not work, the problem is likely a bad battery, dirty contacts, or a damaged fob, not a programming issue.