Just like any other battery, the one in your car key fob will eventually wear out. Are you finding yourself pressing the unlock button multiple times before your car responds? It might be time to consider changing the battery in your key fob.
For many, the battery inside car key remotes, transponders, and key fobs seems inaccessible. While you could visit a dealership, a car repair shop, or even your local battery store for a professional key fob battery replacement, you can actually handle this task yourself.
Replacing a car key fob battery is significantly easier than replacing your car’s main battery. It requires minimal tools, a fresh lithium battery, and a bit of carefulness. Lack of caution could potentially lead to needing a complete key fob replacement, but thankfully, aftermarket options are available if necessary.
Is your car key fob not working as reliably as it used to? The good news is you likely already have everything you need to restore its functionality.
Can You Really Replace Your Key Fob Battery at Home? Absolutely!
Replacing your key fob battery is a straightforward process with the right tools. Here’s what you’ll typically need:
- A thin, flat tool: A watch knife or small flathead screwdriver works perfectly for gently prying open the key fob case.
- The correct replacement battery: Most key fobs use a CR2032 coin cell battery, widely available in stores.
- A precision screwdriver (possibly): Depending on your key fob model, a small screwdriver (around 1.4mm to 2.4mm) might be needed for battery compartment access.
- Tweezers (optional but helpful): Tweezers can assist in handling the small battery.
- Your smartphone: Use your phone’s camera to take reference photos during disassembly.
The process of Changing The Battery In A Key Fob generally involves these simple steps:
- Open the key fob case: Carefully pry open the plastic casing of your key fob.
- Remove the old battery: Take out the depleted battery.
- Insert the new battery: Place the new key fob battery in the correct orientation.
- Close the case: Snap the key fob case back together securely.
- Opening a key fob with a watch knife is easy, as Mike Harris, Interstate All Battery Center manager of production and engineering shows. | Image: Mike Harris*
Identifying the Correct Key Fob Battery Size
Before you start, it’s wise to check if your key fob case indicates the required battery size. Look for embossed markings on the back of the fob or inside the key housing.
While many car key fobs utilize the common CR2032 coin cell battery, variations exist depending on your car’s year, make, and model. For example, some models might require a CR1250 battery or even multiple batteries, like the Ford Mustang key fob which often uses two.
If your key fob doesn’t specify the battery type externally, don’t worry. You’ll just need to carefully open the case to identify the battery inside.
Safely Prying Open Your Key Fob Case
When opening your key fob, gentle and methodical prying is key. Avoid forcing it open from one point, as this could damage the case and lead to needing a key fob replacement.
Instead, use your flat tool to gently wedge around the seam of the case. Many key fobs have a small notch to help you begin. Once you’ve created a small opening, continue to work your tool around the perimeter, carefully separating the fasteners like peeling an orange. Minimal pressure is usually sufficient to pop the case open.
Remember to be gentle to avoid accidentally launching the internal components across the room!
The Importance of Taking a Reference Photo
Key fob internals can differ significantly, even within the same car make and model year. Before removing the old battery, take a quick photo with your phone. This reference picture is invaluable when reassembling the fob, ensuring all parts go back in their correct positions.
This simple step is crucial in preventing errors that could lead to needing a new key fob simply due to incorrect reassembly. Your photo will also clearly show the battery’s orientation, specifically whether the positive (+) side faces up or down.
Handle the Internal Components with Care
Inside the key fob, you’ll find delicate wiring and a circuit board. It’s crucial to avoid disturbing these components. Mishandling them could indeed lead to a situation where a key fob replacement becomes necessary.
Use tweezers or a similar precision tool to carefully lift the battery from its housing. Some key fobs have small clips or sliding metal pieces securing the battery. Gently move these aside to release the battery, but avoid pulling out the circuit board or any antennas.
The electronic circuits within your key fob retain your car’s programming. Disturbing them unnecessarily might require a trip to the dealership or a specialized service to reprogram your key fob.
Get Batteries for Both Your Car and Key Fob at Keyfobx.com
Ensure long-lasting power for both your vehicle and your key fob by choosing quality batteries. At keyfobx.com, we not only specialize in key fob services and replacements, but we also provide a wide range of batteries to keep you powered up. Find the right battery for your key fob and explore our other automotive solutions today!
