Open the battery compartment on the back of the remote

The battery compartment on a Chamberlain remote is located on the back, usually held closed by a small sliding cover or a screw. Most Chamberlain remotes use a plastic sliding cover that you push or slide downward to reveal the battery inside. If your remote has a screw instead, use a small flathead screwdriver to remove it—keep the screw in a safe place so you don't lose it.

Before you open the compartment, look at the back of the remote to see which type of closure yours has. The sliding cover is more common on newer models and requires no tools. Older Chamberlain remotes may have a screw-fastened cover, which takes about 30 seconds to remove.

Identify the battery type and note the orientation

Once the compartment is open, you will see the battery sitting inside. Most Chamberlain garage door remotes use a CR2032 coin cell battery, which is a small, flat, round battery about the size of a dime. Some older or larger Chamberlain remotes may use AA or AAA batteries instead, so check what you have before you buy a replacement.

Before you remove the old battery, notice which side is facing up—the positive side (marked with a + symbol) or the negative side (marked with a − symbol). The battery must go back in the same way. Take a quick photo with your phone if you are unsure, so you can refer to it when you insert the new one.

Key Takeaways

  • Most Chamberlain remotes use a CR2032 coin cell battery, though some older models use AA or AAA batteries instead.
  • The battery compartment is on the back of the remote and opens either by sliding a plastic cover downward or by removing a small screw.
  • Note which side of the battery faces up before you remove it, so you can insert the new battery in the correct orientation.
  • CR2032 batteries cost between $3 and $8 and are sold at most drugstores, hardware stores, and online retailers.
  • If the remote still does not work after you change the battery, the remote itself may need to be replaced or reprogrammed.

Remove the old battery and insert the new one

Gently pry out the old battery using your fingernail or a plastic tool—do not use a metal screwdriver or knife, as these can damage the compartment or create a spark. Once the battery is out, dispose of it properly. Many drugstores and electronics retailers have battery recycling bins near the checkout, or you can throw it in the trash if your area does not have a recycling program.

Take your new CR2032 battery and insert it into the compartment with the positive side facing up, matching the orientation you noted from the old battery. Press it down gently until it sits flat. You should hear or feel a small click as it settles into place. Do not force it—if it does not sit flat, remove it and flip it over to check the orientation.

Close the battery compartment

If your remote has a sliding cover, push it upward until it clicks or snaps into place. The cover should sit flush with the back of the remote with no gaps. If your remote has a screw, reinsert it and tighten it by hand first, then use your screwdriver to snug it down. Do not overtighten—you only need enough pressure to hold the cover closed.

Once the compartment is sealed, wipe the back of the remote with a dry cloth to remove any dust or fingerprints. This is also a good time to check that the battery compartment is fully closed and that nothing looks loose or damaged.

Test the remote to confirm the new battery works

Stand near your garage door and press the button on the remote. The garage door should open or close as normal. If it does not respond, press the button a few more times—sometimes the door needs a moment to react. If the remote still does not work, the battery may not be making good contact with the terminals inside the compartment.

Remove the remote battery again and check that the positive and negative sides are clean and free of dirt or corrosion. Wipe the battery and the inside of the compartment with a dry cloth, then reinsert the battery and test again. If the remote works now, you are done. If it still does not work after a second attempt, the remote itself may be faulty and may need to be replaced.

When to replace the remote instead of just the battery

If you have changed the battery and the remote still does not work, the problem is likely inside the remote itself. The circuit board, buttons, or internal wiring may be damaged or worn out. Chamberlain remotes are not repairable—they are designed to be replaced as a unit.

A replacement Chamberlain remote costs between $20 and $60 depending on the model. You can order one online or buy one at a hardware store. When you receive the new remote, you will need to program it to your garage door opener by pressing a button on the opener itself—the exact steps depend on your opener model, but most Chamberlain openers have a "Learn" button on the motor unit that you hold for a few seconds while pressing the remote button.

Frequently Asked Questions

Where can I buy a CR2032 battery?

CR2032 batteries are sold at drugstores like CVS and Walgreens, hardware stores like Home Depot and Lowe's, grocery stores, and online at Amazon and eBay. They usually cost $3 to $8 per battery. Some stores sell them in multipacks, which is cheaper per battery if you have other devices that use them.

How long does a CR2032 battery last in a garage door remote?

A CR2032 battery typically lasts 3 to 4 years in a Chamberlain remote, depending on how often you use the remote. If you use your garage door opener multiple times per day, the battery may wear out faster. If you rarely use it, the battery may last longer.

Can I use a different battery type in my Chamberlain remote?

No. You must use the exact battery type that came in your remote. Using the wrong battery can damage the remote or cause it to malfunction. Check the old battery or your remote's manual to confirm the type before you buy a replacement.

What if my remote has two batteries instead of one?

Some older Chamberlain remotes use two AA or AAA batteries. If yours has two, replace both at the same time, even if only one is dead. Make sure both batteries are inserted in the correct direction—the positive end should face the same way in both slots.

Do I need to reprogram my remote after changing the battery?

No. Changing the battery does not erase the remote's programming. Once you insert the new battery and close the compartment, the remote should work when ready without any additional steps.