What You Need to Know Before You Start
The battery in your Dodge Charger key fob typically lasts three to four years before it needs replacement. When the fob stops locking or unlocking your car from a distance, or the buttons become sluggish, a dead battery is usually the cause. You can replace it yourself in about five minutes with a coin and a replacement battery that costs between $3 and $8.
Dodge Charger key fobs use a CR2032 battery, which is a flat, coin-shaped lithium cell you can find at any pharmacy, grocery store, or hardware store. The fob itself does not need to be reprogrammed after you swap the battery — it will work when ready once the new battery is installed.
Key Takeaways
- Dodge Charger key fobs use a CR2032 battery that you can buy at any drugstore or supermarket for $3 to $8.
- You need only a coin (penny, dime, or quarter) to open the fob and swap the battery; no special tools required.
- The entire process takes about five minutes and requires no reprogramming after the new battery is installed.
- The battery compartment is on the back or side of the fob, held closed by a small slot that a coin can turn.
Locate the Battery Compartment on Your Fob
Hold your Dodge Charger key fob in your hand and examine the back and sides. You will see a small rectangular slot or seam running horizontally across the plastic. This slot is where the battery compartment opens. On most Charger fobs, this slot runs along the edge where the two halves of the plastic casing meet.
The slot is designed to accept a coin. You do not need a special tool — a penny, dime, or quarter works equally well. If you cannot when ready spot the slot, run your fingernail or a coin edge along the seams of the fob. The slot will feel slightly recessed and will be the only place on the fob where a coin can catch.
Open the Fob and Remove the Old Battery
Insert your coin into the slot with gentle, steady pressure. Turn the coin counterclockwise (to the left) as if you were opening a jar. The slot will rotate slightly — usually a quarter turn is enough. Do not force it; if you meet resistance, you are turning the wrong direction or the coin is not seated properly in the slot.
Once the slot has turned, the battery compartment cover will pop out or slide free. Set it aside where you will not lose it. Inside the compartment, you will see the old CR2032 battery sitting flat in a small circular or rectangular holder. Note which side is facing up — the positive side (marked with a + symbol) typically faces outward toward you.
Gently pry the old battery out using your fingernail or the edge of your coin. It should come free with minimal effort. If it is stuck, do not force it; a small amount of corrosion sometimes holds old batteries in place. Try working your fingernail under the edge and lifting gently.
Install the New CR2032 Battery
Before you insert the new battery, check the orientation of the old one you just removed. The positive side (marked +) should face outward. Lay the new CR2032 battery into the compartment with the same orientation — positive side facing you.
Press the battery down gently until it sits flat and level in the holder. You should feel a slight click or resistance as it settles into place. Do not force it; the battery should sit flush without any rocking or tilting.
Close the Fob and Test the Buttons
Align the battery compartment cover with the slot on the fob. Slide or press the cover back into place until it is flush with the rest of the plastic casing. Insert your coin into the slot again and turn clockwise (to the right) until the cover is snug. Do not over-tighten; a firm quarter turn is sufficient.
Press each button on the fob — lock, unlock, and panic if your model has one — and listen for the click of the internal mechanism. Point the fob at your Charger from a few feet away and press the lock button. Your car should respond when ready with lights or a horn chirp. If the fob works, the battery replacement is complete and no reprogramming is needed.
What to Do If the Fob Still Does Not Work
If you installed a new battery and the fob still does not respond, the battery may be defective or installed incorrectly. Remove the cover again and check that the battery is sitting flat and level in the compartment. Make sure the positive side is facing outward. If the battery is loose or tilted, press it down firmly and close the fob again.
If the battery is seated correctly and the fob still does not work, try a different CR2032 battery from a different package or store. Occasionally a battery from the shelf is defective or has been sitting unused for years. If a second new battery also fails, the problem is likely inside the fob itself — a broken button contact or corroded circuit — and the fob may need replacement rather than repair.
Where to Buy a CR2032 Battery
CR2032 batteries are sold at nearly every pharmacy, grocery store, and hardware store in the United States. Common retailers include CVS, Walgreens, Walmart, Target, Home Depot, and Lowe's. You can also order them online from Amazon or eBay if you prefer. Prices range from $3 to $8 depending on the brand and whether you buy a single battery or a multi-pack.
Name-brand batteries (Energizer, Duracell, Panasonic) and store-brand batteries (CVS brand, Walmart brand) all work equally well in Dodge key fobs. There is no performance difference between them. If you plan to replace batteries in multiple fobs or devices, buying a multi-pack is more economical than buying single batteries.
Frequently Asked Questions
How do I know if my key fob battery is dead?
The most common sign is that the lock and unlock buttons stop working from a distance, though the buttons may still click when pressed. Some fobs also work intermittently — they work from close range but not from across a parking lot. If the buttons feel sluggish or require multiple presses, the battery is likely weak.
Can I use a different battery size instead of CR2032?
No. The CR2032 is the only battery size that fits Dodge Charger key fobs. Other sizes will not fit in the compartment or will not make proper contact with the internal terminals. Always use CR2032 specifically.
Do I need to reprogram my key fob after changing the battery?
No. Dodge key fobs do not require reprogramming after a battery change. The fob will work when ready once the new battery is installed and the cover is closed. Reprogramming is only necessary if you have lost your fob or purchased a replacement fob.
What should I do with the old battery?
CR2032 batteries contain lithium and should not be thrown in the trash. Most pharmacies and retailers that sell batteries also accept old batteries for recycling at no charge. You can also take old batteries to a local hazardous waste collection site or electronics recycling center.
Why is my new battery not working even though it is installed correctly?
The battery may be defective, or the fob itself may have internal damage. Try removing the battery, waiting 30 seconds, and reinstalling it to reset the fob's internal circuit. If that does not work, try a different CR2032 battery from a different package. If a second battery also fails, the fob likely needs replacement.