Chamberlain 8160W Manual page 33

Battery Backup
3 Charge the Battery
The battery charges when the garage door opener is plugged into a 120Vac electrical outlet that has
power and requires 24 hours to fully charge. A fully charged battery supplies 12Vdc 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. To obtain maximum battery life and prevent damage,
disconnect the battery when the garage door opener is unplugged for an extended period of time,
such as a summer or winter home.
4 Battery Status LED
GREEN LED:
All systems are normal.
• A solid green LED light indicates the battery is fully charged.
• A flashing green LED indicates the battery is being charged.
ORANGE LED:
The garage door opener has lost power and is in battery backup mode.
• A solid orange LED with beep, sounding approximately every 2 seconds, indicates the
garage door opener is operating on battery power.
• A flashing orange LED with beep, sounding every 30 seconds, indicates the battery is low.
RED LED:
The battery needs to be replaced.
• A solid red LED with beep, sounding every 30 seconds, indicates the battery will no longer
hold a charge. Go to LiftMaster.com to purchase a replacement battery to allow your system
to operate during a power outage.
NOTE: The Battery Status LED is most visible with the garage door opener light off. Battery does not
have to be fully charged to operate the garage door opener.
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Battery Status LED