What battery your Dodge Charger key fob needs and where to find it
Most Dodge Charger key fobs use a CR2032 coin cell battery, the same flat, round battery found in watches and calculators. You can buy one at any pharmacy, grocery store, or big-box retailer for between $3 and $8. Some Chargers from certain model years use a CR2025 instead, which is slightly thinner but looks identical at first glance — the number printed on the battery itself tells you which one you have once you open the fob.
Before you buy, check your owner's manual or search online for your specific model year, since Dodge has used both types. If you already have the fob open, the battery itself will be labeled with the correct number. Having the right battery matters because putting a CR2025 in a fob designed for CR2032 can cause the buttons to work inconsistently.
Key Takeaways
- Dodge Charger key fobs typically use CR2032 batteries, though some model years use CR2025 — check your manual or the battery label to be sure.
- You can open most Charger fobs by sliding a flat tool into the seam between the two halves, then gently prying them apart without forcing.
- The battery sits in a small metal holder; note which side faces up before you remove it, then insert the new one the same way.
- If your fob still does not work after replacing the battery, the problem may be a worn button contact or a cracked circuit board inside the fob.
Opening your key fob without damaging it
The two halves of a Dodge Charger key fob are held together by a seam, not screws. Locate the thin line running around the edge of the fob — this is where the two plastic pieces meet. Slide a flat tool like a coin, flathead screwdriver, or plastic spoon into that seam at one corner.
explore gentle, steady pressure to separate the halves. Do not twist or force — the plastic can crack if you push too hard. Work your way around the seam if the fob does not pop open when ready. Once you have a small gap, you can usually pry the rest open by hand. The two halves are connected by a thin ribbon cable, so do not pull them completely apart; just open them enough to reach the battery.
Removing and replacing the battery
Inside the fob, the battery sits in a small metal holder or clip. Before you touch it, take a moment to notice which side is facing up — the positive side (marked with a plus sign) or the negative side (marked with a minus sign). This matters because the battery will not work if you put it in backwards.
Gently pry the battery out of its holder using your fingernail or a plastic tool. Do not use anything sharp that could scratch the circuit board. Once the old battery is out, insert the new one with the same side facing up as the old one was. The battery should sit flat in the holder and click into place. If it does not sit flush, you may have it backwards — flip it and try again.
Closing the fob and testing the buttons
Align the two halves of the fob so the ribbon cable is not twisted or pinched. Press them together firmly until you hear or feel a click. The seam should be flush all the way around — if there is a gap, the halves are not fully seated and you should press harder.
Test each button on the fob: lock, unlock, and trunk release if your model has one. Hold the fob pointed at your Charger from a few feet away and press each button. You should see the lights flash or hear the locks respond. If nothing happens, try pressing the buttons harder — sometimes a new battery needs a moment to make full contact with the contacts inside the fob.
What to do if the fob still does not work
If the buttons do not respond after you have installed a fresh battery, the problem is usually inside the fob itself, not the battery. The rubber pads under the buttons wear out over time, or the metal contacts on the circuit board become corroded or damaged. In either case, the fob cannot send a signal even though the battery is good.
You have two options: replace the fob entirely, or have it repaired by a locksmith or dealership. A replacement fob from a Dodge dealership typically costs $200 to $400, while an aftermarket fob from an online retailer may cost $50 to $150. A locksmith can sometimes repair the contacts for $50 to $100, though this depends on the damage and whether they have the parts in stock. If your Charger is still under warranty, contact the dealership to see whether they will replace the fob at no cost.
Preventing battery drain and fob damage
Key fob batteries last between three and four years under normal use. You can extend that lifespan by keeping the fob away from extreme heat, moisture, and direct sunlight. Do not leave it in a hot car or expose it to water — even brief contact with water can corrode the circuit board inside.
If you notice the buttons becoming sluggish or requiring harder presses before the battery dies completely, that is a sign the battery is weakening. Replacing it at that point, rather than waiting for it to fail completely, can prevent you from being locked out of your car. Keep a spare CR2032 battery in your glove box or at home so you can replace it when ready if needed.
Frequently Asked Questions
Can I use a different battery if I cannot find CR2032?
CR2025 and CR2032 are not interchangeable, even though they look similar. CR2025 is thinner and may not make proper contact with the holder in your fob, causing the buttons to work intermittently. Always use the exact battery type your fob is designed for. If your store is out of stock, order online or try another retailer rather than substituting.
How do I know if my battery is dead or if the fob is broken?
Replace the battery first — it is the cheapest and fastest test. If the fob works perfectly after you install a new battery, the old one was straightforward dead. If the buttons still do not work, the problem is the fob itself, not the battery. You can also test the fob by pointing it at your phone camera and pressing a button; if you see a brief flash of light on the camera screen, the fob is sending a signal and the battery is fine.
What if I drop the fob in water?
Remove the battery when ready and let both the fob and battery dry completely for at least 24 hours before reassembling. Do not try to use the fob while it is wet. Once it is dry, install a fresh battery — the old one may have corroded contacts. If the fob still does not work after drying, water damage to the circuit board is likely and the fob will need to be replaced.
Can I replace the battery myself or do I need a dealer?
You can replace the battery yourself — it takes about five minutes and requires only a flat tool and a new battery. You do not need special training or equipment. However, if the fob is damaged, cracked, or the buttons do not work after you replace the battery, a dealer or locksmith should handle the repair or replacement.