what size battery do i need for my key fob

4 min read 23-12-2024

what size battery do i need for my key fob

Meta Description: Is your car key fob battery dead? This guide helps you find the right replacement battery quickly! Learn how to identify your key fob's battery type, where to buy replacements, and helpful tips for extending battery life. We cover common battery sizes and brands, plus troubleshooting advice. Don't get stranded – get the right battery now!

Finding the Right Battery for Your Key Fob

A dead car key fob battery is incredibly inconvenient. Fortunately, replacing it is usually a simple task. The first step is identifying the correct battery size. This guide will walk you through the process.

1. Identifying Your Key Fob's Battery Type

The most reliable way to find the correct battery size is to check the key fob itself.

Look inside the key fob: Many key fobs have a small compartment, usually accessible by pressing a button or sliding a cover. Inside, you'll find the old battery. The battery size (e.g., CR2032, CR2025) is typically printed directly on the battery.
Consult your car's manual: Your owner's manual should specify the type of battery used in your key fob. This is a valuable resource if you can't access the battery compartment easily.
Check online resources: Search online using your car's make, model, and year. Many forums and websites have databases of key fob battery information. Be sure to double-check the information, as different years or models may vary.

Common Key Fob Battery Sizes:

CR2032: This is one of the most common sizes used in key fobs. It's a 3-volt lithium coin cell battery.
CR2025: Similar to the CR2032, but slightly smaller. Also a 3-volt lithium coin cell battery.
CR1620: A smaller 3-volt lithium coin cell battery. Less common than CR2032 or CR2025.

Image: [Insert image here of common key fob batteries – CR2032, CR2025, CR1620 – clearly labeled. Image should be compressed for fast loading.] Alt Text: Common key fob battery sizes: CR2032, CR2025, and CR1620.

2. Where to Buy Replacement Batteries

Once you know the battery size, you have several options for purchasing a replacement:

Auto parts stores: Stores like AutoZone, Advance Auto Parts, and NAPA Auto Parts typically carry a wide selection of key fob batteries.
Electronics stores: Best Buy, RadioShack (where available), and similar stores often stock these batteries as well.
Online retailers: Amazon, eBay, and other online retailers offer convenient purchasing options.
Grocery stores and pharmacies: Many larger grocery stores and pharmacies stock a limited selection of common battery sizes.

Pro Tip: Buy several replacement batteries at once. This way, you’ll always have one on hand when needed.

3. Replacing Your Key Fob Battery: A Step-by-Step Guide

Disclaimer: The process of replacing a key fob battery varies depending on the car make and model. Always consult your car's manual for specific instructions.

(General Instructions – may not apply to all key fobs):

Locate the battery compartment: Find the small compartment on your key fob.
Open the compartment: This might involve pressing a button, sliding a cover, or using a small tool.
Remove the old battery: Carefully remove the old, depleted battery.
Insert the new battery: Make sure the positive (+) side of the new battery faces up (as indicated in the battery compartment).
Close the compartment: Securely close the battery compartment.
Test the key fob: Try to lock and unlock your car to confirm the new battery is working.

4. Extending Your Key Fob Battery Life

While key fob batteries have a limited lifespan, you can extend their life with a few simple steps:

Avoid extreme temperatures: Keep your key fob away from direct sunlight and extreme heat or cold.
Minimize button presses: Only press the buttons when necessary. Repeated use drains the battery faster.
Remove the battery when not in use (if possible): If you're storing your key fob for an extended period, consider removing the battery to prevent it from draining completely.

Frequently Asked Questions (FAQs)

Q: My key fob doesn't work, but the battery seems fine. What should I do?

A: If the battery appears to be new or has sufficient charge, the problem might lie elsewhere. Check the key fob's circuitry for any damage. Also, check the connection between the battery and the circuitry. In some cases, the key fob itself may need to be replaced. Contact your car dealership or a locksmith for assistance.

Q: What happens if I use the wrong size battery in my key fob?

A: Using an incorrect battery size can damage the key fob's circuitry and potentially render it useless. Always use the exact battery size specified by your car's manufacturer.

Q: How often should I replace my key fob battery?

A: Key fob battery life varies depending on usage and other factors. Generally, you can expect a battery to last for one to three years. If your key fob's range decreases significantly, or if it stops working altogether, it's time for a new battery.

This comprehensive guide should help you find the right battery size for your key fob. Remember to always check your car’s manual and double-check the information before purchasing. Happy driving!