Open the key fob case without breaking it
Most Dodge key fobs split into two halves along a seam that runs around the edge. Look for a small slot or groove on one side — this is where you insert a flat tool to pry the case apart. A flathead screwdriver, a coin, or a plastic spoon works. Insert the tool gently into the slot and twist slightly; the case will pop open without force.
Some newer Dodge fobs have a small button on the back that releases the key blade first. If you see a button, press it and slide the blade out before you attempt to open the case. This gives you room to work and prevents the blade from getting in your way.
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 Dodge fobs use CR2032, CR2025, or CR2016. Check which one is in yours before you buy a replacement, or take a photo of the battery to show at the store.
Key Takeaways
- Dodge key fobs split along a seam; use a flathead screwdriver or coin in the slot to pry the case open gently.
- The battery is a coin-cell type, usually CR2032, CR2025, or CR2016 — check the number printed on the old battery before you buy a new one.
- Note which side of the battery faces up before you remove it, because the new battery must go in the same way.
- After you insert the new battery, press the case halves together until they click, then test the fob on your vehicle before you leave the store.
Remove the old battery and note its position
The battery sits in a metal clip or holder inside the case. Gently pry it out with your fingernail or a plastic tool — do not use a metal screwdriver, which can scratch the circuit board. The battery will pop out easily once you lift one edge.
Before you throw the old battery away, look at which side was facing up. Most coin-cell batteries have a flat side and a slightly raised side. The raised side is the positive terminal and must face up in the holder. Take a mental note or a quick photo so you do not insert the new battery upside down.
Insert the new battery the same way
Place the new battery into the metal holder with the positive side (the raised side) facing up, matching the position of the old battery. Press down gently until you hear or feel a small click — the battery should sit flat and not rock back and forth.
If the battery does not stay in place or feels loose, remove it and check that the metal clip is not bent. A bent clip will not hold the battery securely. If the clip is bent, you may need to take the fob to a Dodge dealer or a locksmith to have it repaired.
Close the case and test the fob
Align the two halves of the case so the seam matches up evenly on all sides. Press them together firmly until you hear a click or feel them snap into place. The case should be tight with no gaps. If it does not close smoothly, remove the battery and check that nothing is blocking the seam.
Once the case is closed, test the fob on your vehicle. Press each button — lock, unlock, and panic if your fob has one — and listen for the door locks to respond. If the fob does not work, open the case again and check that the battery is seated correctly and facing the right direction.
Where to buy the right battery
Coin-cell batteries are sold at pharmacies, grocery stores, hardware stores, and big-box retailers. Walgreens, CVS, and Walmart all stock them in the watch and battery section. You can also order them online from Amazon or eBay. A single battery costs between $3 and $8 depending on the brand and where you buy it.
Buy a name-brand battery if you can — Energizer, Duracell, and Panasonic are reliable choices. Generic batteries are cheaper but may not last as long. Since you will only change this battery every few years, the extra dollar or two for a known brand is worth it.
What to do if the fob still does not work
If you installed a new battery and the fob still does not respond, the problem is usually not the battery. The circuit board inside may have gotten wet, or a button contact may be worn out. Open the case again and look for any corrosion — white or green crusty spots — on the metal contacts or the circuit board. If you see corrosion, the fob may need professional repair.
Another common issue is a stuck button. Press each button several times to make sure it moves freely. If a button feels stuck or does not click, it may be jammed with dirt or debris. You can try cleaning around the button with a dry cotton swab, but if that does not work, a locksmith or Dodge dealer can replace the button pad.
How long a key fob battery lasts
A new coin-cell battery in a Dodge key fob usually lasts between three and four years, depending on how often you use the fob. If you press the buttons many times a day, the battery will drain faster. If you use the fob only a few times a week, it may last longer.
Some fobs give you a warning before the battery dies — the buttons may respond more slowly or require multiple presses. If you notice this, change the battery soon. A dead fob can leave you locked out of your vehicle, so it is better to replace the battery early than to wait until the fob stops working entirely.
Frequently Asked Questions
Can I use a different battery size if I cannot find the exact one?
No. Using a battery that is too thick or too thin will either not fit in the holder or will not make proper contact with the circuit board. Always use the exact size printed on the old battery. If your store does not have it in stock, order it online or try another store.
What should I do with the old battery?
Coin-cell batteries contain small amounts of toxic material and should not go in the trash. Most pharmacies and retailers that sell batteries will take old ones back for recycling at no charge. Ask at the customer service desk or look for a battery recycling bin near the checkout.
Why is my new fob battery draining so fast?
A battery that drains in weeks rather than years usually means a button is stuck and pressing constantly, or the case is not closing properly and the circuit is always on. Open the case and check that all buttons move freely and that the case seals tightly. If a button is stuck, clean around it with a dry cotton swab.
Can I change the battery myself or do I need a locksmith?
You can change it yourself — the process takes about five minutes and requires only a flathead screwdriver or coin. You do not need special tools or training. The only reason to see a locksmith is if the case will not open, the battery holder is damaged, or the fob still does not work after you install a new battery.
Does the fob need to be reprogrammed after I change 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.