Open the remote and locate the battery compartment

Most LiftMaster remotes use a straightforward sliding or hinged battery cover on the back. Look for a small slot or seam running horizontally across the back panel. Slide your fingernail or a flat tool (like a butter knife) into the slot and gently push or pry the cover toward the bottom of the remote. The cover should slide off without much force—if you're struggling, you're likely pushing in the wrong direction.

Some older LiftMaster models have a cover that swings open like a door rather than sliding. If you see a small hinge on one edge, gently lift or swing the cover open from the opposite side. Once the cover is off, you'll see the battery sitting in a plastic holder, usually held in place by a small spring or clip on one end.

Key Takeaways

  • LiftMaster remotes typically use a CR2032 or CR2025 coin-cell battery, which you can find at any drugstore, hardware store, or supermarket for a few dollars.
  • Note which direction the battery is facing—the flat side with the plus sign (+) should point toward you or upward—before you remove it.
  • Slide or swing the battery cover off gently; forcing it can crack the plastic and damage the remote.
  • After inserting the new battery, test the remote by pressing a button while standing near the garage door opener to confirm it works before closing the cover.

Identify the correct battery type for your remote

LiftMaster remotes most commonly use a CR2032 coin-cell battery, which is a flat, round silver battery about the size of a dime. Some older or specialty models may use a CR2025, which is slightly thinner but the same diameter. Check the battery compartment itself—the plastic holder usually has the battery size printed on it, or check your remote's manual if you still have it.

If you're unsure, take a photo of the battery compartment and show it to a store employee at a pharmacy, hardware store, or supermarket. They can tell you the exact type in seconds. These batteries cost between $2 and $5 and are sold in the pharmacy or electronics section of most stores. You can also order them online, though you'll pay shipping for a battery that costs less than a coffee.

Remove the old battery and note its orientation

Before you pull the old battery out, look at which side is facing up. The side with a plus sign (+) or the word "positive" is the top. The blank side is the negative end. This matters because the new battery must go in the same way, or the remote won't work.

Gently lift or slide the battery out of its holder. If it's stuck, try rocking it slightly side to side rather than pulling straight up. Once it's out, set it aside—don't throw it away yet in case you need to check the type again. The spring or clip that was holding it in place should still be visible in the compartment.

Insert the new battery with the correct side facing up

Take your new CR2032 or CR2025 battery and orient it so the flat side with the plus sign (+) faces the same direction as the old battery did. Slide or place the battery into the holder, making sure it sits flat and the spring or clip holds it snugly in place. You should hear or feel a small click as it seats properly.

Don't force the battery into the holder. If it doesn't slide in smoothly, check that you're not trying to insert it upside down. The battery should sit flush with the top of the plastic holder, not sticking up or sitting loose. If the spring is bent or broken, the battery may not make good contact and the remote won't work—in that case, the remote itself may need repair or replacement.

Test the remote before closing the cover

Before you snap the cover back on, press one of the buttons on the remote while standing within 20 feet of your garage door opener. You should see the door move or hear the opener respond. If nothing happens, open the cover again and check that the battery is sitting flat and the plus sign is facing the right direction.

If the remote still doesn't work after you've confirmed the battery orientation, try pressing the button several more times—sometimes a new battery needs a moment to make full contact. If it works, you're done. If it doesn't work after a few tries, the remote itself may be faulty, and you may need to replace it rather than just the battery.

Close the battery cover securely

Slide the battery cover back into place by pushing it upward (or in the direction it came from) until you hear or feel it click. The cover should sit flush with the back of the remote with no gaps. If it's a hinged cover, swing it closed until it latches.

Don't overtighten or force the cover—it should close smoothly. A cover that's forced too hard can crack the plastic or damage the battery contact inside, which will cause the same problem you just fixed. Once it's closed, test the remote one more time by pressing a button near the garage door opener to confirm everything still works.

Troubleshooting if the remote still doesn't work

If you've installed a new battery with the correct orientation and the remote still won't work, the problem is likely not the battery. Check that the battery compartment is clean and free of corrosion—if you see white or blue crusty buildup inside, that's corrosion from an old leaky battery. Gently clean the metal contacts inside with a dry cloth or cotton swab before inserting the new battery.

If the remote worked before and suddenly stopped, and a new battery doesn't fix it, the remote's internal circuit board or buttons may be damaged. Water damage is also common in garage remotes because they're often left in cars or humid spaces. If cleaning the contacts doesn't work, you'll likely need to replace the remote itself. LiftMaster sells replacement remotes that work with most openers, and they're usually between $20 and $40.

Frequently Asked Questions

How often do I need to replace the battery in my LiftMaster remote?

Most CR2032 batteries last between one and three years depending on how often you use the remote. If you use your garage door opener several times a day, the battery may wear out faster. If the remote suddenly stops working after working fine for months, a dead battery is usually the first thing to check.

Can I use a different type of battery in my LiftMaster remote?

No. LiftMaster remotes are designed for specific battery types, usually CR2032 or CR2025. Using the wrong size or type can damage the remote or cause it to malfunction. Always match the battery type printed on the compartment or in your manual.

What should I do with the old battery after I remove it?

Don't throw coin-cell batteries in the trash. Most pharmacies, electronics stores, and recycling centers accept used batteries for free. Some stores that sell batteries also have a drop-off bin near the register. Check your local recycling program's website to find a drop-off location near you.

Why isn't my remote working even though I put in a new battery?

Check that the battery is facing the right direction—the plus sign should match the orientation of the old battery. Also make sure the battery is sitting flat and fully seated in the holder. If it's still not working, try cleaning the metal contacts inside the compartment with a dry cloth, as corrosion can prevent the battery from making contact.

Can I replace the battery myself or do I need to call a technician?

Replacing the battery is a straightforward task you can do yourself in under a minute. You don't need any special tools or skills. If you're uncomfortable opening the remote or if it still doesn't work after you've replaced the battery, then calling a garage door technician is the next step.