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32
Battery Backup*
1 Install the Battery
To reduce the risk of FIRE or INJURY to persons:
•
Disconnect ALL electric and battery power BEFORE performing ANY service or maintenance.
•
Use ONLY LiftMaster part # 485LM for replacement battery.
•
DO NOT dispose of battery in fire. Battery may explode. Check with local codes for disposal
instructions.
ALWAYS wear protective gloves and eye protection when changing the battery or working around the
battery compartment.
The automatic garage door lock will unlock when the garage door is opened, and will remain disabled until
power is restored.*
1. Unplug the garage door opener.
2. Open the control door panel.
3. Partially insert the battery into the battery compartment with the terminals as shown.
4. Connect red (+) and black (-) wires from the garage door opener to the corresponding terminals on the
battery.
5. Fully insert the battery and close the control door panel.
Battery Status LED
* If applicable.
2 Test the Battery
Depending on the power level, the battery may need to charge before performing the test. The garage door
opener must be unplugged to test the battery.
1. Unplug the garage door opener. The battery status LED will either glow solid orange indicating opener is
operating on battery power or will flash indicating low battery power.
NOTE:Make sure the garage door
opener is unplugged.
2. Open and close the door using the remote control or control panel. NOTE: The garage door opener may
run slower if the battery is not fully charged. The battery will take 24 hours to fully charge.
3. Open and close the door using the remote control or control panel. While the motor is on, the battery
status LED will either glow solid orange indicating opener is operating on battery power or will flash
indicating low battery power. NOTE: The garage door opener may run slower if the battery is not fully
charged.
4. Plug in the garage door opener. Verify the battery status LED is flashing green, indicating the battery is
charging.
1 2
3
3 Charge the Battery
The battery charges when the garage door opener is plugged into a 120 Vac electrical outlet that has power and
requires 24 hours to fully charge. A fully charged battery supplies 12 Vdc to the garage door opener for up to
24 hours of normal operation during an electrical power outage. After the electrical power has been restored,
the battery will recharge within 24 hours. The battery will last approximately 1 to 2 years with normal usage.
NOTE: When the garage door opener is in battery backup mode the garage door opener lights, Timer-to-Close,
remote close, and camera features are unavailable.
In battery backup mode, the Automatic Garage Door Lock will unlock when the garage door is opened, and will
remain disabled until power is restored.*
* If applicable.
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