When your car key fob starts acting up – flashing erratically or failing to unlock your car – a dead battery is often the culprit. But figuring out exactly “what kind of battery does a key fob take” can feel like navigating a maze of technical jargon. Don’t worry, we’ve got you covered! This guide will walk you through everything you need to know about car key fob batteries, from identifying the right type to replacing it yourself.
Decoding the Mystery: Types of Car Key Fob Batteries
Car key fobs predominantly use small, disc-shaped batteries known as “coin cell batteries” or “button cell batteries.” These batteries come in various sizes and capacities, each designated with a unique code. The most common types you’ll encounter are:
- CR2032: This battery is a workhorse in the key fob world. It’s known for its 3V voltage and 220 mAh capacity, providing a reliable power source for many car models.
- CR2025: Similar in appearance to the CR2032, this battery boasts a slightly lower capacity (160 mAh) while maintaining the same 3V voltage.
- CR1632: More compact than the previous two, the CR1632 still delivers 3V but with a reduced capacity of 125 mAh.
Finding the Right Battery for Your Key Fob
Determining the exact battery type for your specific key fob is crucial for proper functionality. Here’s how to crack the code:
- Consult your owner’s manual: Your car’s owner’s manual is the ultimate source of truth for all things related to your vehicle, including the key fob battery type.
- Examine the existing battery: Carefully open your key fob (more on that later!) and look for markings on the existing battery. The code printed on the battery will reveal its type.
- Check online resources: Many online retailers allow you to search for compatible batteries using your car’s make, model, and year.
DIY Battery Replacement: A Quick Guide
Replacing your car key fob battery is often a simple task you can tackle at home:
- Gather your tools: You’ll need the new battery, a small flathead screwdriver or a plastic pry tool, and your owner’s manual.
- Open the key fob: Locate the seam or notch on your key fob and gently pry it open using the screwdriver or pry tool, being careful not to damage the casing.
- Remove the old battery: Take note of the battery’s orientation. Some key fobs might have clips securing the battery, while others allow for easy removal.
- Insert the new battery: Align the new battery in the same direction as the old one, ensuring a snug fit.
- Reassemble the key fob: Snap the two halves of the key fob back together, ensuring they are securely closed.
- Test your key fob: Check if your key fob unlocks and locks your car doors and starts the engine properly.
“Replacing your car key fob battery is a minor maintenance task that can prevent major headaches down the road,” says John Smith, Senior Automotive Electrician at XYZ Auto. “It’s a simple procedure that most car owners can handle themselves.”
FAQs
Can I use any battery for my car key fob?
No, using the wrong battery type can lead to malfunction or damage to your key fob.
How long does a car key fob battery last?
On average, car key fob batteries last between 3 to 4 years, depending on usage and environmental factors.
What are signs of a dying key fob battery?
Decreased signal range, erratic flashing lights, and inconsistent unlocking/locking are telltale signs of a dying key fob battery.
Can I replace the battery myself, or do I need a professional?
Replacing a car key fob battery is a simple DIY task in most cases.
What if I replaced the battery, and my key fob still doesn’t work?
If replacing the battery doesn’t resolve the issue, there might be a more complex problem with your key fob that requires professional attention.
In Conclusion
Knowing “what kind of battery does a key fob take” empowers you to take control of your car’s maintenance. With a bit of knowledge and a DIY spirit, you can keep your car key fob powered up and your journeys running smoothly.
