This video demonstrates how to replace the backup battery in your LiftMaster garage door opener.
0:00 Replacing the battery on your LiftMaster garage door opener
0:16 When to replace the backup battery
0:32 Safety precautions for working around the battery compartment
0:39 Removing the old battery from the garage door opener
1:10 Installing the new battery
1:39 Battery LED statuses when charging
1:56 Testing the new battery
2:10 Battery LED statuses
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