Open the key fob case and swap out the old battery in about five minutes
Most Dodge key fobs open by sliding a small metal or plastic lever along the seam where the two halves meet. Once you locate that seam — usually on the side or bottom of the fob — push the lever gently in the direction the seam runs. The case will separate into two pieces. Inside you will see a small coin-cell battery, typically a CR2032 or CR2025, sitting in a plastic holder. Note which side faces up, remove the old battery, and drop in a new one of the same type with the positive side facing the same direction. Snap the case back together and test the buttons. The whole job takes longer to describe than to do.
If your fob does not have a visible lever, look for a small slot or notch cut into the edge. A flathead screwdriver or coin can fit into that slot to pry the case open. Work gently around the perimeter rather than forcing one spot, or you risk cracking the plastic. Some newer Dodge fobs use a screw instead — usually one Phillips-head screw hidden under a rubber pad or sticker on the back. Peel back the pad, remove the screw, and the case will come apart.
Key Takeaways
- Dodge key fobs typically use a CR2032 or CR2025 coin-cell battery that you can buy at any drugstore or supermarket for two to five dollars.
- The case opens by sliding a lever, prying with a flathead screwdriver, or removing a single Phillips-head screw — the method depends on your fob model year.
- Note the direction the old battery faced before you remove it, so you install the new one the same way.
- After you snap the case shut, press each button on the fob to confirm the battery is making contact and the fob works.
Identifying your battery type before you buy
The battery type is printed on the plastic holder inside the fob. CR2032 is the most common size in Dodge fobs from the last fifteen years, but some models use CR2025 or even CR2016. The numbers refer to the battery's diameter and thickness in millimeters — a CR2032 is 20 mm across and 3.2 mm thick. If you cannot read the label clearly, take a photo of the inside of the fob with your phone and bring it to a pharmacy or electronics store. Staff can match it on sight.
Do not guess and buy the wrong size. A battery that is too thick may not fit in the holder, and one that is too thin will not make reliable contact. You can find the correct battery in the watch and hearing-aid section of most drugstores, at supermarket pharmacies, at dollar stores, and online. Prices range from two to five dollars per battery, and most stores sell them in packs of two or four.
What to do if the case will not open
If you have tried the lever, prying, and looking for a screw and the fob still will not budge, the case may be glued or welded shut. This is rare in Dodge fobs but does happen in some models. Before you force it and break the plastic, try running the fob under warm (not hot) water for a minute. If there is adhesive, warmth can soften it enough to let you pry gently at the seam.
If that does not work, your fob may need to be replaced rather than repaired. A new Dodge key fob costs between thirty and eighty dollars depending on the model, and you can order one online or buy one at a dealership. Some dealerships will program a new fob for you for a fee, usually between fifty and one hundred fifty dollars. Before you pay for a new fob, confirm with the dealership that your current fob cannot be opened — they may have tools or techniques you do not.
Testing the fob after you close it
Once the case is snapped or screwed shut, stand near your Dodge and press the lock button. You should hear the doors lock and see the lights flash. Press unlock and listen for the unlock sound. If nothing happens, open the case again and check that the battery is seated properly in its holder — it should sit flat with no gaps. Also confirm the positive side (marked with a plus sign or raised bump) is facing up, or whichever direction the old battery faced.
If the fob still does not work after you reseat the battery, the battery itself may be defective. Try a different new battery from a different pack or store. If a second battery does not work, the fob's circuit board may be damaged, and replacement is the next step. This is uncommon, but it does happen if the fob has been dropped or exposed to water.
Keeping your new battery working longer
Coin-cell batteries in key fobs typically last three to four years with normal use. You can extend that lifespan by keeping the fob away from heat, moisture, and direct sunlight. Do not leave it in a hot car, on a sunny dashboard, or in a pocket near your body heat for long periods. If your fob gets wet, open the case as soon as possible and let the battery and circuit board air-dry for at least an hour before closing it again.
If you use your fob heavily — pressing the buttons many times per day — the battery will drain faster. Some people carry a spare fob to spread the load. If you have only one fob and use it constantly, you may need to replace the battery every two years instead of three or four.
Where to buy Dodge key fob batteries
CR2032 and CR2025 batteries are sold almost everywhere. Walgreens, CVS, and Rite Aid stock them in the pharmacy or watch section. Walmart and Target carry them in the electronics or pharmacy aisle. Amazon and eBay sell them in bulk packs, often cheaper per battery if you buy ten or twenty at once. Local hardware stores and auto parts chains like AutoZone and O'Reilly also stock coin-cell batteries.
Prices are lowest at dollar stores and warehouse clubs like Costco, where a pack of four CR2032 batteries may cost three to four dollars. Pharmacy chains charge more per battery but sell single units if you need only one. Do not buy batteries from gas stations or convenience stores unless you have no other option — they are usually marked up significantly and may be older stock.
Frequently Asked Questions
Can I use a rechargeable coin-cell battery in my Dodge key fob?
Rechargeable coin-cell batteries are available, but they are not recommended for key fobs. They hold less charge than disposable batteries and may not provide enough power to reliably lock or unlock your vehicle. Stick with a standard disposable CR2032 or CR2025 battery.
What happens if I put the battery in backwards?
The fob will not work. The battery will not make proper contact with the circuit board if the positive and negative sides are reversed. Open the case again and flip the battery so the positive side (marked with a plus or a raised bump) faces the same direction as the old battery did.
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 reprogramming steps.
How do I know if my key fob battery is dying before it stops working completely?
A dying battery often shows up as a fob that works only when you hold it close to the vehicle, or buttons that require multiple presses to register. If you notice the range getting shorter or the response getting slower, the battery is likely nearing the end of its life. Replacing it now will prevent you from being locked out.
Can I replace the battery myself or do I need to go to a dealership?
You can replace it yourself in five minutes with no tools other than a flathead screwdriver or coin. There is no reason to pay a dealership for this job. The only exception is if your fob case will not open — in that case, a dealership may be able to help.