What battery your Dodge key fob uses and where to find it
Most Dodge key fobs use a CR2032 coin cell battery, the same flat, round battery you'll find in watches and calculators. Some older Dodge models use CR2025 or CR2016 instead—the number refers to the size and capacity. You can buy CR2032 batteries at any drugstore, supermarket, or hardware store for between $3 and $8 for a pack of two or four. They're also available online.
The easiest way to confirm which battery your fob needs is to look at the back of the fob itself. Most Dodge fobs have a small seam or slot running around the edge. Open that slot and you'll see the battery compartment. If there's already a battery inside, the type is printed on it. If the fob is dead and you can't open it yet, check your vehicle's owner's manual—it will list the correct battery type for your model year.
Key Takeaways
- Dodge key fobs almost always use CR2032 batteries, which cost $3 to $8 and are sold at any drugstore or supermarket.
- You can open most Dodge fobs by finding the seam around the edge and gently prying with a flat tool like a coin or butter knife.
- The battery sits in a metal holder with a plus side facing up; note which way it goes before you remove it.
- Replacing the battery takes less than two minutes and requires no tools beyond what you have at home.
- If the fob still doesn't work after a fresh battery, the problem is likely the circuit board or buttons, not the battery itself.
How to open your Dodge key fob safely
Look for a small seam or slot that runs around the edge of the fob where the two plastic halves meet. This seam is usually on the side or back. Insert a flat object—a coin, a butter knife, a flathead screwdriver, or even a plastic spoon—into the seam and gently twist or pry. You're not forcing it; you're just explore steady pressure until the two halves separate.
If you can't find a seam, some Dodge fobs have a small button or release catch on the back. Press or slide it while gently pulling the fob apart. The plastic is durable, but avoid using sharp tools or hammering, which can crack the casing or damage the circuit board inside.
Once the fob is open, you'll see the battery sitting in a metal holder. The holder usually has a small lip or tab on one side. Note which way the battery is facing—the plus side (marked with a +) should be facing up toward you. This matters when you put the new battery in.
Removing and replacing the battery
Gently lift the battery out of its holder using your fingernail or the edge of a coin. Don't force it; if it's stuck, try lifting from the edge rather than the center. Once it's out, you can see the metal holder clearly and confirm the orientation.
Take your new CR2032 battery and place it into the holder with the plus side facing up, the same way the old one was oriented. Press down gently until you hear or feel a small click—the battery should sit flat and snug. If it's loose or tilted, remove it and try again.
Close the fob by pressing the two halves together until they snap. You may hear a click or feel resistance as the seam closes. Don't force it; if it's not closing smoothly, open it again and make sure the battery is sitting flat and the circuit board isn't bent.
Testing your key fob after battery replacement
Stand a few feet from your Dodge and press any button on the fob—lock, unlock, or panic. The lights on your vehicle should respond, or you should hear the locks engage. If nothing happens, try pressing each button a few times; sometimes the buttons need a moment to make contact with the new battery.
If the fob still doesn't work, open it again and check that the battery is seated correctly and facing the right direction. Remove it, wait a few seconds, and reinstall it. This sometimes resets the connection.
If the fob works for a few seconds and then stops, or if only some buttons work, the problem is likely not the battery. The circuit board or the rubber button pad may be worn or damaged, and the fob may need professional repair or replacement.
How long a new battery lasts in a Dodge key fob
A fresh CR2032 battery typically lasts between three and four years in a Dodge key fob, depending on how often you use it. If you press the buttons dozens of times a day, the battery may last closer to two years. If you use the fob only occasionally, it may last four years or longer.
You'll notice the fob starting to fail before the battery is completely dead. The buttons may require harder presses, or you may have to stand closer to the vehicle for the signal to work. When you see these signs, it's time to replace the battery.
What to do with the old battery
CR2032 batteries contain small amounts of lithium and other materials that should not go in the trash. Most drugstores, supermarkets, and electronics retailers have battery recycling bins near the checkout or customer service desk. Drop the old battery in one of these bins at no cost.
If you can't find a recycling bin nearby, you can also mail used batteries to a recycling center. Search online for "battery recycling near me" to find the closest option. Some municipalities also have hazardous waste collection days where you can drop off batteries for free.
When to replace your Dodge key fob instead of just the battery
If you've replaced the battery and the fob still doesn't work, or if only some buttons work, the problem is inside the fob itself. The rubber button pad may have worn through, or the circuit board may have corroded or cracked. In these cases, replacing the battery won't help.
A new Dodge key fob costs between $200 and $400 if you buy it from a dealership, or $50 to $150 if you buy an aftermarket fob online and have a locksmith or dealership program it to your vehicle. Some locksmiths can also repair the circuit board or button pad for less than the cost of a new fob, so it's worth calling around before you decide to replace the whole thing.
If your fob is physically cracked or the plastic casing is broken, replacement is usually the only option. A damaged casing can let moisture inside, which will corrode the circuit board and make the fob unreliable.
Frequently Asked Questions
Can I use a different battery size if I can't find CR2032?
No. CR2025 and CR2016 are smaller and thinner, and they won't make proper contact in a fob designed for CR2032. Using the wrong size can cause the fob to work intermittently or not at all. CR2032 batteries are widely available, so it's worth waiting a day or two to get the right one rather than trying a substitute.
Why does my new battery only work for a few days?
If a fresh battery dies quickly, the problem is usually inside the fob, not the battery itself. The circuit board may be drawing too much power due to a short or corrosion, or the button contacts may be stuck. Try opening the fob and gently cleaning the battery contacts and the inside of the metal holder with a dry cloth. If that doesn't help, the fob likely needs repair or replacement.
Is it safe to replace the battery myself, or should I go to a dealership?
Replacing the battery yourself is completely safe and takes less than two minutes. You don't need any special tools or training. A dealership will charge you $50 to $100 to do the same job. Save your money and do it at home.
What if I can't get the fob open?
Try using a plastic tool instead of metal—a plastic spoon, a credit card edge, or a plastic pry tool designed for opening phones. Plastic is less likely to slip and damage the casing. If the fob is glued shut or the seam is too tight, a locksmith or dealership can open it for you, though this usually costs $20 to $50.
Can I replace the battery in a smart key or push-button fob?
Yes, the process is the same. Smart keys and push-button fobs use the same CR2032 batteries and open the same way. The only difference is that some smart keys have a metal key blade that you may need to slide out first to access the battery compartment. Check your owner's manual if you're not sure where the seam is.