Open the key fob case first

Most Dodge Ram key fobs split into two halves along a seam that runs around the edge. Look for a small slot or groove on the side of the fob — this is where you insert a flat tool to pry the case apart. A flathead screwdriver, a coin, or a plastic pry tool all work. Insert the tool gently into the slot and twist slightly to separate the two halves.

Do not force the case open. If it does not budge after light pressure, check the other edges — some fobs have the seam on a different side than you expect. Once you find the right spot, the case should pop apart with minimal effort.

Key Takeaways

  • Dodge Ram key fobs typically use a CR2032 or CR2025 battery, which you can buy at any drugstore or supermarket for under five dollars.
  • The battery sits in a metal holder inside the fob case and slides out sideways — do not pry it straight up, or you may damage the holder.
  • When you insert the new battery, the positive side (marked with a plus sign) must face upward toward the fob's circuit board.
  • After closing the fob, test all buttons before you put it back in your pocket to confirm the battery is making contact.

Locate and remove the old battery

Once the case is open, you will see a round metal battery holder in the center of the circuit board. The battery sits inside this holder and is held in place by a metal clip or spring on one side. The battery does not need to be pried out — it slides out sideways.

Push the battery gently toward the clip side, and it will slide out of the holder. If the battery is stuck, do not force it. A small amount of corrosion or debris can cause sticking. Gently rock the battery side to side as you push, and it should come free.

Check the battery type and buy a replacement

Look at the top of the old battery. It will have a number printed on it — usually CR2032 or CR2025. Write down this number before you go to the store. Both types are standard coin-cell batteries sold at pharmacies, grocery stores, and hardware stores. A single battery costs between two and five dollars.

Do not assume all Dodge Ram fobs use the same battery. Some older models use CR2032, while others use CR2025. Using the wrong size will not damage the fob, but the battery may not make proper contact and the fob will not work. If you cannot read the number on the old battery, bring the old battery to the store and match it by size.

Insert the new battery correctly

Before you put the new battery in the holder, look at it closely. One side has a plus sign (+) printed on it — this is the positive side. The other side is blank or has a minus sign (−) — this is the negative side. The positive side must face upward, toward the circuit board inside the fob.

Slide the new battery into the metal holder the same way the old one came out — sideways, not straight down. Push it in until it sits flat in the holder and the metal clip holds it in place. The battery should not move when you gently push on it.

Close the fob and test it

Line up the two halves of the fob case so the seam is even all the way around. Press them together firmly until you hear or feel a click. The fob should snap shut without gaps. If it does not close evenly, open it again and check that the battery is sitting flat in its holder — a battery that is not fully seated can prevent the case from closing.

Once the fob is closed, press each button — lock, unlock, and panic if your fob has one — and listen for the click of the lock or the sound of the car responding. If nothing happens, open the fob again and check that the positive side of the battery is facing upward. If the battery is oriented correctly and the fob still does not work, the circuit board may be damaged, and you may need a replacement fob.

What to do if the fob still does not work

If you installed the battery correctly and the fob still does not respond, the problem is usually inside the fob, not the battery. Water damage, corrosion on the circuit board, or worn-out buttons can all prevent the fob from working even with a fresh battery.

Check the circuit board for white or green crusty deposits, which indicate corrosion. If you see corrosion, you can try cleaning the board with a cotton swab and a small amount of rubbing alcohol, then letting it dry completely before closing the fob. If the board looks clean and the fob still does not work, a replacement fob from a Dodge dealer or a third-party supplier is usually the next step.

Frequently Asked Questions

Can I use a different battery type if I cannot find the exact one?

CR2032 and CR2025 are not interchangeable. CR2032 is thicker and will not sit properly in a holder designed for CR2025. Using the wrong type may cause the battery to lose contact with the circuit board. Always match the number printed on your old battery.

How long does a key fob battery usually last?

Most key fob batteries last between three and four years with normal use. Heavy use — pressing the buttons many times per day — can shorten the lifespan. If your fob stops working after only a year or two, water damage or corrosion may be the cause rather than a dead battery.

What should I do with the old battery?

Coin-cell batteries contain small amounts of lithium and should not go in the trash. Most pharmacies and grocery stores have a battery recycling bin near the checkout or customer service desk. You can also take old batteries to a local hazardous waste collection site.

Will changing the battery erase my fob's programming?

No. The fob's programming is stored on the circuit board, not in the battery. Changing the battery will not affect which vehicle the fob controls or any custom settings you have made.

Can I change the battery myself or do I need a dealer?

You can change the battery yourself. The process takes less than five minutes and requires only a flathead screwdriver or coin. A Dodge dealer will change it for you, but they typically charge between fifteen and thirty dollars for the service, plus the cost of the battery.