Like any battery-powered device, your car key fob relies on a battery to function. When your car key fob starts becoming unresponsive or has a decreased range, it’s often a sign that the battery is dying and needs replacing. But What Kind Of Battery For Car Key Fob do you need? 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.
Understanding Car Key Fob Batteries
Car key fobs typically use small, round, flat batteries known as coin cell batteries. These batteries are also sometimes called button cell batteries due to their shape. They are lithium batteries, known for their long life and stable power output, essential for the reliable operation of your car’s remote locking and security system.
The most common type of battery for car key fobs is the CR2032 battery. However, different car makes and models, and even different key fob designs within the same brand, might use different battery types. Other common types include CR2025, CR2016, CR2450, and CR1632. Each of these numbers indicates the battery’s physical dimensions and capacity.
How to Determine the Right Battery for Your Key Fob
Finding out what kind of battery for car key fob your vehicle requires is usually straightforward. Here are a few methods:
1. Check Your Key Fob Casing
Many key fobs have the battery type printed directly on the case itself. Look closely at the back of your key fob or inside the battery compartment. You might find embossed or printed letters and numbers indicating the battery type, such as “CR2032”.
2. Consult Your Car Owner’s Manual
Your car’s owner’s manual is a valuable resource. It should contain specifications for your key fob, including the battery type it uses. Check the index or the section on key fobs and remote controls.
3. Open Your Key Fob and Check the Old Battery
If you can’t find the battery type on the casing or in the manual, you’ll need to open your key fob. This sounds daunting, but it’s often a simple process.
Tools You’ll Need:
- A small, flat-head screwdriver or a watch knife
- A new replacement battery of the correct type
- Tweezers (optional, but helpful)
Steps to Open Your Key Fob and Identify the Battery:
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Locate the Notch or Seam: Examine your key fob for a small notch or seam. This is usually where the two halves of the case join.
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Use a Pry Tool: Gently insert the tip of your flat-head screwdriver or watch knife into the notch or seam.
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Pry Gently: Carefully twist or lever the tool to start separating the two halves of the key fob casing. Work your way around the seam, gently prying until the case pops open. Avoid forcing it, as you could damage the casing.
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Take a Photo: Before removing the old battery, take a picture of the inside of the key fob with your phone. This is crucial! Note the orientation of the battery (positive side up or down) and the position of any other components. This photo will be your reference when reassembling the fob.
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Identify the Battery Type: Once the key fob is open, you’ll see the battery. The battery type (e.g., CR2032) is always printed on the battery itself. Note this down.
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Remove the Old Battery: Use your fingers or tweezers to carefully remove the old battery. Some fobs have small clips holding the battery in place, which you might need to gently move.
Replacing Your Car Key Fob Battery
Now that you know what kind of battery for car key fob you need and have the replacement, here’s how to install it:
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Insert the New Battery: Place the new battery into the battery compartment, ensuring the correct orientation (positive side up or down, as noted in your photo). It should fit snugly.
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Reassemble the Key Fob: Carefully snap the two halves of the key fob case back together. Press firmly until you hear or feel it click closed all the way around.
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Test Your Key Fob: Test the buttons on your key fob to ensure it’s working correctly. Lock and unlock your car, and test any other functions like the panic button or trunk release.
Tips for Key Fob Battery Replacement
- Work on a Clean Surface: Choose a clean, well-lit workspace to avoid losing any small parts.
- Be Gentle: Handle the key fob components and battery with care to avoid damage.
- Don’t Touch the Circuit Board: Avoid touching the circuit board or any wiring inside the key fob, as static electricity or mishandling could cause damage.
- Dispose of Old Batteries Properly: Lithium batteries should be disposed of according to local regulations for electronic waste.
Where to Buy Car Key Fob Batteries
You can find what kind of battery for car key fob you need at various locations:
- Drug Stores and Pharmacies: Most drug stores carry common coin cell batteries like CR2032.
- Grocery Stores: Larger grocery stores often have a battery section where you can find these batteries.
- Electronics Stores: Stores specializing in electronics will definitely stock a range of coin cell batteries.
- Online Retailers: Online marketplaces like Amazon are convenient options, offering a wide selection and competitive prices.
- Auto Parts Stores: Some auto parts stores also carry key fob batteries.
Replacing your car key fob battery is a simple DIY task that can save you time and money compared to going to a dealership. By knowing what kind of battery for car key fob is required and following these steps, you can quickly restore your key fob to full working order.
