To replace the battery in a key fob, follow these general steps:

• Locate the notch or seam on the key fob where it can be pried open. Some fobs may require removing an internal mechanical key first by pressing a release button and pulling it out

• Use a small flathead screwdriver, a butter knife, or the mechanical key itself to gently pry apart the two halves of the fob. Work carefully to avoid damaging the plastic casing

• Once open, identify the battery inside. Note the battery type (often a CR2032 coin cell, but it can vary by car model) and the orientation (which side is positive/negative)

• Remove the old battery, using a small tool if needed to pry it out

• Insert the new battery in the same orientation as the old one, ensuring it fits snugly

• Snap the two halves of the key fob back together securely. Reinsert the mechanical key if applicable

• Test the key fob to confirm it works properly (lock/unlock doors, remote start, etc.)

• Dispose of the old battery properly

This process is similar for most car key fobs and even other small devices like garage remotes

. The key is to be gentle when opening the casing and careful to insert the battery with correct polarity. If you want a quick summary:

• Find the notch and open the fob carefully.
• Remove old battery and note orientation.
• Insert new battery correctly.
• Snap fob back together and test.
• Dispose of old battery responsibly.

This DIY approach saves you from dealer fees and is straightforward with common household tools