Car key fobs have become an integral part of the modern driving experience, offering convenience and security with the push of a button.
These handy devices control remote locking, unlocking, and even starting the car without physical contact with the vehicle. At the heart of every key fob's functionality is a small but mighty component: the battery.
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Understanding Key Fob Batteries
Key fob batteries are specialized, coin-shaped cells designed to provide a long-lasting power source for remote entry systems in a compact form. These batteries are non-rechargeable and need to be replaced periodically to ensure the key fob operates effectively.
Most Popular Key Fob Batteries
1. CR2032: One of the most common batteries used in car key fobs, the CR2032 is a 3-volt lithium battery known for its long life and reliability.
2. CR2025: Slightly thinner than the CR2032, the CR2025 is also a 3-volt lithium battery used in key fobs that require a slimmer profile.
3. CR2016: Another 3-volt lithium battery, the CR2016 is used in key fobs with very compact designs. It offers good capacity within its size limitations.
4. CR1620: The CR1620 is a 3-volt lithium battery that finds its place in many car key fobs. It combines a good balance of thickness, diameter, and capacity, making it suitable for devices requiring a compact power source with reliable performance.
Note that battery equivalents and replacements, for example, CR1620 battery equivalent models may include batteries with very similar name (DL1620) but they all contain the same numbers (1620) denoting battery dimensions.
Maintaining and Replacing Key Fob Batteries
Signs Your Key Fob Battery Needs Replacement:
- Decreased range when locking or unlocking your car.
- Inconsistent functionality or having to press buttons multiple times.
- The car's response to the key fob is slower than usual.
Replacing the Battery:
1. Identify the Battery Type: Check your car's owner manual or remove the battery from the key fob to identify its type.
2. Purchase the Correct Replacement: Buy a new battery of the same type, paying attention to the model number (e.g., CR2032, CR1620).
3. Open the Key Fob: Use a flathead screwdriver or a key fob opening tool to gently pry open the key fob case.
4. Replace the Battery: Carefully remove the old battery, avoiding touching the new battery's surface with your fingers, as oils and dirt can affect performance. Place the new battery in the same orientation as the old one.
5. Close the Key Fob: Snap the two halves of the key fob back together, ensuring a tight seal to prevent moisture or dirt ingress.
Troubleshooting Common Key Fob Issues
- If the key fob doesn't work after replacing the battery, ensure the battery is correctly oriented and fully seated.
- Check the key fob's internal contacts for corrosion or dirt, which can interfere with battery connectivity.
- In some cases, the key fob may need to be reprogrammed after a battery change. Consult your vehicle's manual or a professional for guidance.
Final Thoughts
Car key fob batteries, including the popular CR1620, are crucial for the seamless operation of your vehicle's remote functions. Regularly checking and replacing these batteries ensures that your car key fob remains reliable and functional. By following the proper maintenance and replacement procedures, you can avoid the inconvenience of a non-responsive key fob and enjoy the full convenience of your vehicle's remote capabilities.
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