Open the key fob case

Most Dodge 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 to separate the case without cracking the plastic.

If your fob has no visible seam, check whether the case slides apart instead of splits. Some models have a button on the back that releases a sliding battery cover. Press or slide that cover away from the fob body to expose the battery compartment. Do not force any part of the case — if it resists, you may be prying at the wrong angle or location.

Key Takeaways

  • Dodge key fobs typically use a CR2032 or CR2025 coin-cell battery, which you can find at any pharmacy, grocery store, or hardware store for under $5.
  • The battery sits in a small metal holder inside the fob case; note which side faces up before you remove it, because the new battery must go in the same way.
  • After inserting the new battery, press the fob case halves together firmly until they click or snap into place to may support a watertight seal.
  • If the fob still does not work after a new battery, the problem is likely a worn contact or internal damage, not the battery itself.

Identify and remove the old battery

Once the case is open, you will see a small round battery sitting in a metal holder or clip. The battery is typically a CR2032 or CR2025 coin cell — a flat, silver disc about the size of a dime. Before you remove it, note which side is facing up. The positive side (marked with a + symbol) usually faces up, but this varies by model.

Gently pry the battery out of its holder using a fingernail or a plastic tool. Do not use a metal screwdriver directly on the battery, as this can cause a short circuit. Once the battery is out, set it aside and inspect the metal contacts inside the holder. They should be clean and shiny. If they look dark or corroded, wipe them lightly with a dry cloth or a pencil eraser.

Purchase the correct replacement battery

Write down the battery type you removed — either CR2032 or CR2025 — and take that number with you to the store. Both types are standard coin-cell batteries sold at pharmacies, grocery stores, hardware stores, and online retailers. A single battery costs between $2 and $5. Buy a name-brand battery (Energizer, Duracell, or Panasonic) rather than a generic store brand; the difference in price is small and the reliability is higher.

If you cannot find the exact type, do not substitute. A CR2032 and CR2025 look nearly identical but have different thicknesses, and using the wrong one may cause the fob to malfunction or the case not to close properly. When in doubt, ask a store employee to confirm you have the right battery before you leave.

Insert the new battery and close the case

Remove the new battery from its packaging and inspect it for any plastic film or protective coating — some batteries come wrapped, and you must remove this before use. Hold the battery so the positive side (marked +) faces the same direction as the old battery did. Slide or press the new battery into the metal holder until it sits flat and snug.

Now close the fob case by pressing the two halves together firmly. You should hear or feel a click or snap as the case locks into place. If the case does not close flush or feels loose, the battery may be inserted upside down or the case may not be aligned properly. Open it again, check the battery orientation, and try closing it once more. A properly sealed case is important because it keeps moisture out and protects the electronics inside.

Test the key fob before you rely on it

Stand near your Dodge vehicle and press each button on the fob — lock, unlock, panic, and trunk if your model has one. Watch for the lights on the vehicle to respond. If the doors lock and unlock smoothly, the battery is working and installed correctly. Test the fob from different distances to make sure the range is normal.

If the fob does not work after you install the new battery, open the case again and check that the battery is seated firmly in its holder and facing the correct direction. If it is, the problem is likely worn electrical contacts inside the fob or internal damage, not the battery. In that case, you may need to have the fob repaired or replaced by a Dodge dealer.

Store the old battery safely

Do not throw the old battery in the trash. Coin-cell batteries contain materials that should not go to a landfill. Most pharmacies and grocery stores have a battery recycling bin near the customer service desk or at the entrance — ask an employee where it is. Some hardware stores also accept batteries for recycling at no charge.

If you cannot recycle the battery when ready, store it in a cool, dry place away from metal objects. Metal can bridge the battery terminals and cause it to discharge or overheat. Keep it out of reach of children and pets.

Frequently Asked Questions

How long does a Dodge key fob battery last?

Most coin-cell batteries last three to four years in a key fob, depending on how often you use the fob and the brand of battery. If you use your fob multiple times per day, the battery may wear out sooner. If you notice the fob working at shorter distances than before, the battery is likely running low.

Can I use a rechargeable battery in my key fob?

No. Rechargeable coin-cell batteries have a different voltage than standard alkaline batteries and can damage the fob's electronics or fail to power it at all. Always use a fresh alkaline coin-cell battery of the correct type.

What if my fob case is glued shut and will not open?

Some older or damaged fobs are sealed with adhesive. If prying gently does not work, try warming the seam slightly with a hair dryer on low heat for 10 to 15 seconds to soften the adhesive, then try prying again. If the case still will not budge, contact a Dodge dealer about replacing the fob.

Do I need to reprogram my 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 case, the fob should work when ready without any additional steps.

Why is my new fob battery not working?

The most common reason is that the battery is inserted upside down — the positive side must face up. Open the case and check the orientation. If the battery is correct, make sure it is seated firmly in the holder. If it still does not work, the battery may be defective, or the fob's internal contacts may be worn or corroded.