What battery does a garage door opener use?
Most garage door opener remotes use a 3V CR2032 coin cell. Older or larger remotes may use a 12V 23A (also called A23 or MN21) cylindrical battery. Wireless keypads vary — check the back of the unit or the manual.
Common remote batteries by brand
| Brand / remote model | Battery | Notes |
|---|---|---|
| Chamberlain / LiftMaster (most models) | CR2032 | Single coin cell; 2016 / 2025 also used in some older models |
| Genie (ACSCTG, GIT series) | CR2032 | Some older Genie remotes used 3V CR123A or 9V |
| Craftsman (newer) | CR2032 | Manufactured by Chamberlain |
| Linear / Multi-Code (older) | 12V 23A | Cylindrical battery, 28.5 × 10.3 mm |
| Stanley / Overhead Door (older) | 9V or 12V 23A | Varies by era; check battery compartment label |
How to find the correct battery
- Slide or snap open the back panel of the remote — many have a coin-slot indentation.
- The battery type is usually printed on a label inside the compartment, or embossed into the plastic.
- The old battery itself will have the type printed on it.
Battery types explained
| Battery | Voltage | Dimensions | Also called |
|---|---|---|---|
| CR2032 | 3V | 20 × 3.2 mm | DL2032, ECR2032 |
| CR2025 | 3V | 20 × 2.5 mm | DL2025 |
| 12V 23A | 12V | 28.5 × 10.3 mm | A23, MN21, GP23A, L1028 |
| 9V | 9V | 48.5 × 26.5 mm | 6LR61, 1604, PP3 |
Wireless keypads
Garage door wireless keypads (the external number-pad) typically use 9V or AA batteries, sometimes behind a weather-resistant cover. Replace when the backlight dims or button response becomes inconsistent. Most keypads have a battery indicator in the status LED.
Battery life expectation
A CR2032 in a garage remote lasts 2–5 years under typical use (10–20 presses per day). The battery drains from use, not simply from age. If a recently replaced battery dies quickly, the remote circuit may have a fault or the remote may be partially pressing against something in your vehicle.
View on Amazon