Is your car struggling to recognize your key fob? Do you have to press the unlock button multiple times to get a response? It might be time to consider replacing the batteries in your key fobs. Like any battery, key fob batteries wear out over time, and a weak battery can leave you locked out or struggling to start your vehicle remotely.
While professional key fob battery replacement services are available at dealerships and auto repair shops, you might be surprised to learn that changing your key fob battery is a straightforward task you can easily do yourself. Replacing Batteries In Key Fobs is considerably simpler than changing your car battery and typically requires only a few common tools and a fresh, inexpensive lithium battery. With a little care and these instructions, you can avoid the cost of professional service and get your key fob working like new again.
Is your car key fob acting up? The solution might be simpler than you think. You probably already have everything you need to breathe new life into your car key remote.
Step-by-Step Guide to Replace Batteries in Key Fobs Yourself
Replacing batteries in key fobs is easier than you think. Here’s what you’ll need and how to do it:
Tools You’ll Need:
- A thin, flat tool: A watch knife or small flathead screwdriver works perfectly for carefully prying open the key fob case.
- Replacement Battery: Most key fobs use a CR2032 coin cell battery, widely available in stores. Check your fob or owner’s manual to confirm the correct type.
- Precision Screwdriver (possibly): Depending on your key fob model, you might need a small precision screwdriver (around 1.4mm to 2.4mm) to remove screws.
- Tweezers: Tweezers can be helpful for handling the small battery, especially in tight spaces.
- Smartphone Camera: Taking pictures during disassembly is a pro tip to ensure correct reassembly.
Simple Steps for Battery Replacement:
- Open the Key Fob Case: Carefully use your flat tool to pry open the plastic case of your key fob. Look for a notch or seam to start.
- Remove the Old Battery: Once open, gently remove the old battery. Note the battery orientation (+ and – sides) before removal – this is crucial for correct installation.
- Insert the New Battery: Place the new battery in the same orientation as the old one. Ensure it’s securely seated in the battery compartment.
- Close the Key Fob Case: Carefully snap the key fob case back together until it’s fully closed.
This process is demonstrated by Joseph De La Rosa, store manager at Interstate All Battery Center in Surprise, Arizona.
Identifying the Right Batteries in Key Fobs
Before you start taking apart your key fob, it’s wise to determine what type of replacement battery you need. Sometimes, the battery type is indicated directly on the key fob itself.
Check the back of your key fob or inside the battery compartment for any embossed letters or numbers. This might indicate the battery size you need.
While many car key fobs utilize the standard CR2032 coin cell battery, the specific battery type can vary based on your car’s year, make, and model. For example, some vehicles may require a CR1632, CR2025, or other less common coin cell battery. Some key fobs, like those for certain Ford Mustang models, even require two batteries.
If you can’t find the battery type indicated on your key fob, don’t worry. You can still determine the correct battery by carefully opening the case.
Safely Opening Your Key Fob to Access Batteries
When opening your key fob to replace batteries, gentleness is key. Avoid forcing it open, as this could damage the case or internal components, potentially leading to needing a complete key fob replacement.
Instead of trying to pry it open from just one point, work your flat tool around the entire seam of the case. Many key fobs have a small notch specifically designed to help you start the opening process. Once you’ve created a small gap, continue to gently wedge your tool around the case’s fasteners, similar to peeling an orange. You’ll find that it doesn’t require much pressure to pop the fasteners open.
Be mindful not to apply excessive force, as this could cause the fob to burst open and scatter its delicate internal parts.
The Importance of Taking a Picture When Replacing Batteries in Key Fobs
Key fobs can have surprisingly different internal layouts, even within the same car make and model year. Before you remove the old battery, take a quick picture with your smartphone.
This simple step can be a lifesaver during reassembly. Your photo serves as a valuable reference, ensuring that all components, including the new batteries in key fobs, go back into their correct positions. It also clearly shows the correct orientation of the battery – which side faces up – preventing installation errors.
Handling the Internals When Replacing Batteries in Key Fobs
Inside your key fob are delicate electronics. When replacing batteries in key fobs, it’s crucial to avoid disturbing the internal wiring or circuit board. Mishandling these components could lead to malfunctions and the need for a costly key fob replacement.
Use tweezers or a similar precision tool to carefully lift the battery out of its housing. Some key fobs have small clips or sliding metal pieces that secure the battery. Gently move these aside to remove the battery, but avoid pulling out the circuit board or any antennas.
The electronic circuits inside your key fob are programmed to your specific car. Disrupting them unnecessarily might require reprogramming at a dealership or a specialized service center.
Power Up Your Key Fob and Your Car
For reliable, long-lasting power for both your vehicle and your key fob, consider Interstate Batteries. You can find both your car battery and replacement batteries in key fobs at Interstate All Battery Center locations.
