Liftmaster 485LM OEM Battery Backup
Easy day- battery replacement instructions 1. Disconnect power to opener. 2. Using a Philips head screwdriver, remove the battery cover on the motor unit. 3. Remove old battery and discard. 4. Partially insert new battery into motor unit with terminals facing out. 5. Connect red (+) and black (-) wires from motor unit to corresponding terminals on battery. 6. Replace battery cover. 7. Reconnect power.
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CHAMBERLAIN
{"Product Dimensions": "4 x 4 x 4 inches", "Item Weight": "3.13 pounds", "Item model number": "485lm", "Batteries": "1 12V batteries required.", "Is Discontinued By Manufacturer": "No", "Date First Available": "December 4, 2014", "Manufacturer": "Liftmaster", "Number of Batteries": "1 12V batteries required.", "Brand": "CHAMBERLAIN", "Battery Cell Composition": "Lead Acid", "Unit Count": "1 Count", "Reusability": "Rechargeable"}