The Liftmaster 10A20 (CR2032) 3V Lithium Battery is a high-performance Replacement Component designed to restore maximum range and reliability to your garage door opener remotes. As a genuine OEM Gate Part, this premium power cell ensures your residential or commercial Access Control system operates flawlessly, providing consistent voltage to complex transmitters without signal degradation.
Engineered for longevity and stability, the 10A20 battery is perfectly calibrated for LiftMaster's high-demand 300 and 900 series remote controls. Whether you are a professional installer stocking up for service calls or an end-user needing to revive a dead keychain remote, this lithium coin cell provides the critical energy density required for encrypted radio frequency transmission in varying environmental conditions.
Key Features & Benefits
• High-Density Lithium Chemistry: Delivers consistent 3-volt power to prevent signal loss, ensuring your remote maintains its maximum operating range and fast response time.
• Precision CR2032 Form Factor: Manufactured to exact dimensional tolerances, guaranteeing a perfect, tight fit within the remote's battery tray to prevent power disconnections if the remote is dropped.
• Extreme Temperature Tolerance: Operates reliably in severe environments, ensuring your remote functions perfectly whether sitting in a freezing car overnight or enduring intense summer heat.
• Extended 10-Year Shelf Life: Retains its charge during long-term storage, allowing facilities managers and installers to confidently stock replacement units without fear of premature chemical degradation.
• Leak-Proof Construction: Utilizes advanced sealing technology to protect the sensitive internal circuit board of your remote control from corrosive battery acid leaks.
Compatibility Guide
Following strict manufacturer specifications, the Liftmaster 10A20 (CR2032) 3V Lithium Battery is specifically engineered for Chamberlain Group remote transmitters.
• Compatible Brands: LiftMaster, Chamberlain, and Sears Craftsman.
• Supported Series: Designed specifically to power the 300 Series (315 MHz) and 900 Series (390 MHz) remote controls.
• Specific Models: Replaces the primary battery in popular standard and keychain remotes including the 371LM, 372LM, 373LM, 971LM, 973LM, 891LM, 893LM, 893MAX, and 956EV.
Professional Specifications
For technicians and facilities managers, the following data outlines the technical parameters of the 10A20 battery:
• Manufacturer Part Number: 10A20 (Also listed as 010A0020)
• Industry Standard Size: CR2032
• Chemistry: Lithium Manganese Dioxide
• Nominal Voltage: 3.0 Volts DC
• Diameter: 20.0 mm
• Thickness: 3.2 mm
• Terminal Type: Flat Top / Flat Bottom (Polarity clearly marked)
• Rechargeable: No (Primary Cell)
Frequently Asked Questions
Q1: How do I know when my remote needs a new 10A20 battery?
A1: The most common signs of a depleted battery are a significantly reduced operating range, the need to press the button multiple times to activate the door, or the remote's LED indicator light failing to illuminate or appearing very dim during activation.
Q2: Can I use two CR2016 batteries instead of one CR2032?
A2: No. While two CR2016 batteries will physically fit in the exact same space (1.6mm thickness each), stacking them in series will double the output to 6 volts. This excessive voltage will instantly and permanently burn out the logic board in a remote designed specifically for 3 volts.
Q3: Is there a specific way the battery needs to be inserted?
A3: Yes. In almost all LiftMaster and Chamberlain remote controls, the battery must be installed with the positive (+) side facing up, ensuring the marked surface makes direct contact with the primary metal retaining clip inside the remote housing.
Q4: Will this battery work for my exterior wireless keypad?
A4: Generally, no. Most LiftMaster and Chamberlain wireless keypads (such as the 878MAX or 377LM) require a standard 9-volt rectangular battery to power their internal transmitters and the back-lit numeric keys. The 10A20 CR2032 is primarily engineered for handheld and keychain remotes.
Q5: Why shouldn't I touch the flat surfaces of the battery during installation?
A5: Handling the flat top and bottom of a lithium coin cell with bare fingers transfers microscopic skin oils to the metal contacts. This invisible layer of oil acts as an insulator, increasing electrical resistance, which can significantly reduce the effective power output and shorten the lifespan of the battery. Always handle coin cells strictly by their edges.
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