Open the key fob case to access the battery

Most Dodge key fobs split into two halves along a seam that runs around the edge. Look for a small slot or notch on one side of the fob — this is where you insert a flat tool to pry the case apart. A flathead screwdriver, coin, or even a butter knife works. Insert the tool gently into the slot and twist slightly; the case will pop open without much force.

Once the case is open, you will see the battery sitting in a small metal holder. The battery is usually a coin-cell type, most commonly a CR2032, CR2025, or CR2016. Write down the exact number printed on the battery before you remove it — this ensures you buy the correct replacement. The number is stamped directly on the battery's flat surface.

Remove the old battery and note its orientation

Gently pry the battery out of its metal holder using the same flat tool or your fingernail. The holder has a slight lip that holds the battery in place, so a small amount of leverage is all you need. Do not force it; if it is stuck, wiggle it gently side to side first.

Before you set the old battery aside, note which side was facing up. The positive side (marked with a + symbol) should be facing toward you when you look into the open fob. This matters because inserting the replacement battery backward will prevent the fob from working. Take a quick photo of the empty holder if you think you might forget the orientation.

Purchase the correct replacement battery

Take the battery number you wrote down to any pharmacy, grocery store, or hardware store. Most carry coin-cell batteries in their electronics or pharmacy section. A CR2032 costs between $3 and $8 depending on the brand and store. You do not need a special automotive battery — a standard coin-cell battery works perfectly in Dodge key fobs.

If you cannot find the exact number, CR2032 is the most common size for Dodge fobs made in the last 15 years. If your fob uses a different size, the store staff can help you find it once you show them the number from your old battery. Buy one extra battery while you are there; key fob batteries fail unpredictably, and having a spare saves a trip later.

Insert the new battery with the correct side facing up

Remove the new battery from its packaging and check that it is clean and dry. Place it into the metal holder with the positive side facing up — the same orientation as the old battery. Press down gently until you hear or feel a small click; the holder will grip the battery and hold it in place.

If the battery does not click into place, remove it and check that you are inserting it straight down, not at an angle. The holder is designed to grip only when the battery is seated fully. Do not force it; a properly seated battery slides in with minimal pressure.

Close the key fob case and test the buttons

Align the two halves of the case so the seam matches up evenly all the way around. Press the halves together firmly until you hear a click or feel them snap into place. The case should be flush with no gaps. If there is a gap on one side, open it again and reseat the battery — a battery that is not fully seated can prevent the case from closing properly.

Once the case is closed, press each button on the fob — lock, unlock, trunk, and panic if your fob has them. You should hear a beep or see your vehicle respond. If nothing happens, open the case again and check that the battery is seated correctly and facing the right direction. If the fob still does not work after reseating the battery, the problem may be with the fob itself rather than the battery.

Key Takeaways

  • Dodge key fobs open by inserting a flat tool into a small slot on the edge and twisting gently until the case pops apart.
  • Write down the battery number (usually CR2032, CR2025, or CR2016) before removing the old battery so you buy the correct replacement.
  • The positive side of the battery must face up when you insert it, matching the orientation of the old battery.
  • Coin-cell batteries cost $3 to $8 and are sold at pharmacies, grocery stores, and hardware stores in the electronics or pharmacy section.
  • Test all buttons when ready after closing the case to confirm the new battery is working.

Frequently Asked Questions

What if my key fob has a screw instead of a slot?

Some older Dodge fobs use a small Phillips or flathead screw to hold the case together. Use the appropriate screwdriver to remove the screw, then open the case. Keep the screw in a safe place — you will need it to close the fob again after installing the new battery.

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

No. Using the wrong size battery can damage the fob's circuitry or prevent it from working. If your store does not have the exact number, order it online or try another store. The correct battery is inexpensive and worth waiting for.

How long does a key fob battery usually last?

Most coin-cell batteries last three to four years in a key fob, though this varies based on how often you use the fob. If your battery dies much sooner, the fob may have a drain or defect. If it lasts longer, you are straightforward using the fob less frequently.

What should I do with the old battery?

Most retailers that sell batteries also accept old batteries for recycling. Take the old battery back to the store where you bought the replacement — most will dispose of it at no charge. Do not throw it in the trash.

My fob still does not work after I replaced the battery. What is wrong?

First, open the fob again and confirm the battery is seated fully and facing the correct direction. If it is, the problem may be a damaged circuit board, worn buttons, or a dead fob that needs replacement. A Dodge dealership can test the fob and tell you whether it can be repaired or must be replaced.