Garage door remote battery

Many garage door remotes run on a 3 V CR2032 coin cell. LiftMaster sells a CR2032 for various LiftMaster and Chamberlain remotes, and Chamberlain's G956EV-P2 keychain remote ships with one.^{[1 · Oct 29, 2026]}^{[2 · Oct 29, 2026]} Others take a CR1616, an A23 or an A27.^{[3 · Oct 29, 2026]}

A driver parked in front of a garage holds a small clip-on garage door remote with its back open, showing a coin cell battery (AI-generated image)

Batteries used in garage remotes

Battery	Type	Energizer lists it for
CR2032	3 V lithium coin^{[4 · Oct 29, 2026]}	Watches, medical devices, key fobs, electronics^{[3 · Oct 29, 2026]}
CR1616	Lithium coin	Watches, medical devices, garage door openers^{[3 · Oct 29, 2026]}
A23 (MN21/23)	Small cylinder	Garage door openers, car alarms, lighters, key fobs^{[3 · Oct 29, 2026]}
A27	Small cylinder	Garage door openers, wireless doorbells, key fobs, toys^{[3 · Oct 29, 2026]}

How to find yours

Open the remote and read the code on the old battery.
Check the remote's owner's manual; LiftMaster points owners to it for the right battery.^{[1 · Oct 29, 2026]}
Type the code into the battery finder.

LiftMaster says its own CR2032 is discontinued and that the size is available at hardware stores.^{[1 · Oct 29, 2026]}

Safety

Coin cells are dangerous if swallowed: Energizer warns of serious injury or death in as little as 2 hours.^{[4 · Oct 29, 2026]} The EPA says not to put used coin cells in the trash or recycling bin; tape or bag them for a battery recycler.^{[5 · Oct 29, 2026]}

Sources: 1. LiftMaster, 3V CR2032 battery K010A0020 product page. 2. Chamberlain, G956EV-P2 keychain garage door remote product page. 3. Energizer, Battery cross reference guide (PDF, 2021). 4. Energizer CR2032 lithium coin datasheet (PDF). 5. US EPA, Used household batteries. Checked Oct 29, 2026. Inch conversions are our own arithmetic from the millimeter figures. Brand names and trademarks belong to their owners; specs are restated in our own words and tables, not reproduced.