What Kind of Battery Does My Key Fob Need?

what kind of battery does my key fob need

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If you’re faced with the question “What Kind of Battery Does My Key Fob Need?“, you’re not alone. Key fobs have become an essential part of modern vehicles, providing convenient access and security features. Understanding the type of battery your key fob needs is crucial to ensure that it continues to function without any hiccups. In this article, we’ll explore the various types of key fob batteries, how to identify the right one for your key fob, and some useful tips to extend its lifespan.

Let’s dive in!

what kind of battery does my key fob need

What Kind of Battery Does My Key Fob Need?

Key fobs, also known as remote keyless entry devices, have revolutionized the way we interact with our vehicles. These small, handheld devices allow us to lock and unlock our cars, open the trunk, and even start the engine remotely. But what powers these convenient gadgets? Let’s explore the world of key fob batteries.

Key Fob Basics

A key fob is a portable device that communicates with your vehicle using radio frequency signals. It typically consists of buttons for various functions and a small circuit board. An essential question arises when considering the functionality of this device: What Kind of Battery Does My Key Fob Need? This is crucial because the circuit board, along with other components, requires power to function – and that’s where the battery comes in.

Common Key Fob Battery Types

Key fobs generally use coin or button cell batteries due to their compact size. The most common types of batteries found in key fobs include CR2032, CR2025, and CR2016. These batteries are readily available and affordable, making them popular choices for key fobs.

How to Identify the Battery Type

To answer the question “What Kind of Battery Does My Key Fob Need?“, you can follow these simple steps:

  1. Check the Manual: The owner’s manual of your vehicle should specify the type of battery required for your key fob.
  2. Inspect the Old Battery: If the old battery is still in the key fob, carefully remove it and check for the battery type engraved on it.
  3. Visit a Dealership: If you’re unsure, visit the vehicle dealership or a local automotive store, and they can assist you in finding the right battery for your key fob.

Replacing the Key Fob Battery

When it’s time to replace the key fob battery, you can do it yourself in a few simple steps:

  1. Open the Key Fob: Use a small flathead screwdriver to carefully open the key fob casing.
  2. Remove the Old Battery: Take out the old battery and make a note of its type (e.g., CR2032).
  3. Insert the New Battery: Place the new battery in the same position, ensuring the correct side is facing up.
  4. Close the Key Fob: Gently snap the key fob casing back together.

Tips to Prolong Battery Life

To extend the life of your key fob battery, consider these tips:

  1. Limit Usage: Use the key fob’s functions only when necessary.
  2. Store Properly: Keep the key fob in a cool, dry place to prevent extreme temperature fluctuations.
  3. Replace Early: If you notice decreased range or functionality, replace the battery before it fully depletes.
  4. Remove Weak Batteries: Weak batteries can leak and damage the key fob. Remove them promptly.
  5. Keep it Clean: Regularly clean the contacts between the battery and the key fob.


  1. How often should I replace my key fob battery?

    It’s recommended to replace the battery every 1 to 2 years or when you notice reduced range or functionality.

  2. Can I use rechargeable batteries for my key fob?

    It’s best to use non-rechargeable coin cell batteries as they provide consistent power for your key fob.

  3. What should I do if my key fob battery dies?

    You can manually unlock and start your vehicle using the physical key blade integrated into the key fob.

  4. Is it safe to replace the key fob battery myself?

    Yes, it’s safe as long as you follow the proper instructions and handle the battery with care.

  5. Are key fob batteries expensive?

    No, key fob batteries are quite affordable, and it’s a small investment for the convenience they provide.


Here at Mobile Locksmith, we understand the importance of a properly functioning key fob. It’s the gateway to convenience and security for your vehicle. One key aspect of this is knowing What Kind of Battery Does My Key Fob Need? By recognizing the type of battery required and following our simple guidelines for battery replacement and maintenance, you can ensure that your key fob remains reliable and hassle-free, keeping your vehicle safe and accessible.