Open the remote and locate the battery compartment
Most LiftMaster remotes have a battery compartment on the back or side. Look for a small slot or seam running along the edge—this is where the two halves of the remote separate. You do not need tools; use your fingernail or a plastic spoon to gently pry the two halves apart. Start at the slot and work your way around the edge until the remote splits open.
Once the remote is open, you will see the battery sitting in a plastic holder. The battery is usually a 3V lithium coin cell, most commonly a CR2032, though some older LiftMaster models use a CR2025 or 9V battery. Check the side of the battery or the inside of the remote case—the battery type is often printed there. If you cannot find it printed, note the size and shape of the battery you remove, and bring it with you to the store.
Key Takeaways
- LiftMaster remotes open by prying the two halves apart at the seam on the back or side—no tools required.
- Most LiftMaster remotes use a CR2032 coin cell battery, but check the battery itself or the inside of the case to confirm the type.
- When you install the new battery, make sure the positive side (marked with a + sign) faces up toward the circuit board.
- Test the remote by pressing a button before closing it completely; if it does not work, remove and reinsert the battery to may support it is seated properly.
Remove the old battery and note its orientation
Gently lift the old battery out of its holder. Before you throw it away, take a moment to notice which side was facing up—the side with the + symbol should have been pointing toward the circuit board above it. This matters because coin cell batteries only work in one direction.
If the battery holder has a small metal spring or clip, make sure it is still in place and not bent. If it is bent or missing, the new battery may not make proper contact, and the remote will not work. You can gently straighten a bent spring with a plastic tool or your fingernail, but do not use metal because it can scratch the circuit board.
Insert the new battery with the correct side facing up
Place the new battery into the holder with the + side facing up, toward the circuit board. The battery should sit flat and level in the holder. If it rocks or sits at an angle, remove it and check that the holder is clean and free of debris. A speck of dust or corrosion can prevent the battery from sitting flush.
Press down gently on the battery to make sure it is fully seated. You should hear or feel a small click as the metal contacts touch the battery terminals. Do not force it—if it does not seat easily, remove it and check the holder again.
Test the remote before closing it
With the remote still open, press one of the buttons—usually the open or close button. You should see a small red or green light flash inside the remote, or you should hear a faint beep. This tells you the battery is making contact and the remote is working.
If nothing happens, remove the battery and reinsert it. Make sure the + side is facing up and the battery is fully seated in the holder. Try the button again. If the remote still does not respond, the battery may be defective, or the remote itself may need service—see the troubleshooting section below.
Close the remote and test it on your garage door opener
Once the remote responds to a button press, close the two halves of the remote by pressing them together. You should hear a click as the seams line up and the remote snaps shut. Do not force it; if the halves do not come together smoothly, open it again and check that the battery is not sitting too high in the holder.
Now test the remote on your garage door opener from a few feet away. Press the button and listen for the garage door to move. If it opens or closes as expected, the battery change is complete. If the door does not respond, try pressing the button several more times—sometimes a new battery needs a moment to make full contact. If the door still does not move, see the troubleshooting section.
Where to buy replacement batteries and how to dispose of old ones
CR2032 and CR2025 batteries are sold at most drugstores, supermarkets, hardware stores, and online retailers. They cost between $2 and $8 per battery depending on the brand and where you buy them. Buying a multi-pack is often cheaper per battery if you have multiple remotes or devices that use the same type.
Do not throw old batteries in the trash. Most communities have battery recycling programs at retailers like Best Buy or Home Depot, or at your local waste facility. Some pharmacies also accept batteries for recycling. Check your city or county website for a recycling location near you, or call your local waste management department.
Frequently Asked Questions
What if my remote still does not work after I change the battery?
First, remove the battery and reinsert it to make sure it is fully seated with the + side facing up. If that does not work, try a different new battery—the one you bought may be defective. If a second battery does not work, the remote may have a damaged circuit board or button contact, and you will need to replace the remote itself.
Can I use a different battery type, like a 9V instead of a CR2032?
No. The battery type is designed for that specific remote model. Using the wrong battery can damage the circuit board or cause the remote to malfunction. Always use the exact battery type printed on the inside of your remote or on the old battery itself.
How often do I need to change the battery?
Most LiftMaster remote batteries last one to three years, depending on how often you use the remote. If your remote starts to require multiple button presses to work, or if the light inside grows dim, the battery is running low and should be replaced soon.
Is it safe to change the battery myself, or should I call a technician?
Changing the battery is safe and straightforward—it requires no special tools or knowledge. You do not need to call a technician unless the remote still does not work after you have tried a new battery, or if the remote case is cracked or damaged.