A key fob likely uses a small coin cell battery, with common types being CR2032, CR2025, or CR2016. To find out the exact battery type, check the car’s owner’s manual or open the key fob to see the current battery’s model number.
Key fobs have become an essential convenience for car owners. These small, wireless devices allow you to lock, unlock, and start the vehicle with just the push of a button. However, like any electronic device, key fobs run on batteries, and over time, those batteries will eventually need to be replaced. This brings up a common question: What battery does my key fob need?
In this article, we’ll dive deep into understanding the types of batteries used in key fobs, how to identify the right one for the vehicle, and tips for maintaining and replacing the key fob battery. Additionally, we’ll answer some of the most frequently asked questions about key fobs and their batteries.
Contents
Key Fob Batteries
Key fobs typically use small, flat, coin-shaped batteries known as coin cell batteries. These batteries are widely used in small electronics because of their compact size and ability to deliver steady power. Most modern key fobs use lithium coin batteries due to their long shelf life and reliable performance. However, different car brands and models may use different types of coin batteries.
Common Types of Key Fob Batteries
The majority of key fobs use one of the following battery models:
- CR2032
- CR2025
- CR2016
- This battery is 1.6mm thick and has a smaller capacity compared to CR2032 and CR2025.
- It is used less frequently but is found in select key fobs.
- Suitable for car models that require a slimmer battery.
- CR2450
- Larger in size, with a 24.5mm diameter and a thickness of 5mm.
- Used in some key fobs that require more power or for larger, multi-function fobs.
What Battery Does My Key Fob Need?
The type of battery the key fob needs depends on the make and model of the vehicle and the specific key fob design. Here’s how to figure it out:
- Check the Owner’s Manual: The easiest and most reliable way to determine which battery the key fob uses is to consult the vehicle’s owner’s manual. There’s usually a section dedicated to key fobs that specifies the battery type.
- Look Inside the Key Fob: If you don’t have the manual handy, you can open the key fob and inspect the existing battery. Most key fob batteries have the model number printed on them (e.g., CR2032). Take note of this number before buying a replacement.
- Check Online or Contact the Dealer: If you’re unsure, you can search for the vehicle model online to find out the recommended key fob battery. Alternatively, you can contact the local dealership for advice on which battery to use.
How to Replace a Key Fob Battery
Replacing the battery in the key fob is a simple task that you can usually do yourself, saving you a trip to the dealership. Follow this detail guide about key fob battery replacement.
Tips for Extending Key Fob Battery Life
Here are some tips for extending the key fob battery life:
- Minimize Button Presses: Avoid pressing buttons on the key fob unnecessarily. Each press uses a small amount of battery power, and over time, frequent use can drain the battery faster.
- Store the Key Fob in a Cool, Dry Place: Excessive heat and moisture can affect the lifespan of the key fob battery. Avoid leaving the fob in hot places, such as on the dashboard or in direct sunlight.
- Use a Key Fob Cover: A silicone or plastic cover can help protect the key fob from damage and reduce wear on the buttons, extending the battery’s lifespan.
- Turn Off the Key Fob When Not in Use: Some advanced key fobs have an “off” feature or sleep mode. If the key fob has this function, consider turning it off when you’re not using the vehicle for an extended period.
- Replace the Battery Annually: Even if the key fob is still working, replacing the battery every year or two can prevent it from dying unexpectedly. It’s a small cost that ensures you don’t get stranded with a non-functional fob.
Frequently Asked Questions
Here are some FAQs about key fob batteries –
1. How long does a key fob battery typically last?
A key fob battery can last anywhere from one to three years, depending on usage and the specific battery type. Key fobs with more functions (e.g., remote start) may drain the battery faster than simpler models.
2. What are the signs that my key fob battery is low?
The most common signs of a low key fob battery include:
- Decreased range (you have to stand closer to the car for it to respond).
- Delayed or unresponsive button presses.
- A warning light on the dashboard (in some cars).
3. Can I use a different battery type if I can’t find the exact model?
It’s important to use the correct battery type for the key fob, as specified by the manufacturer. Using the wrong battery type can lead to malfunction or damage. If you can’t find the exact battery, it’s best to check with the dealership or a reputable retailer for a suitable replacement.
4. Do I need to reprogram my key fob after replacing the battery?
In most cases, replacing the battery won’t require reprogramming the key fob. However, some car models may lose connection with the vehicle if the battery is completely dead for an extended period. If the key fob stops working after a battery change, consult the owner’s manual for instructions on re-syncing the fob with the car.
5. Can I get my key fob battery replaced at a dealership?
Yes, most car dealerships offer key fob battery replacement services. However, this service may come with a fee, which could be higher than doing it yourself. Replacing the battery on your own is typically much cheaper and takes just a few minutes.
Conclusion
Replacing a key fob battery is a simple, low-cost task that can save you time and hassle in the long run. By identifying the right battery for the key fob, following proper replacement steps, and taking care of the fob, you can ensure it continues to function reliably. Always consult your owner’s manual or contact a professional if you’re unsure about which battery to use. And remember, key fob batteries may be small, but they play a big role in the convenience and security of the vehicle.
Make sure to stay on top of the key fob battery maintenance and enjoy the full benefits of modern car technology!