To keep locks up to dateSync with the lock Change batteries annuallySync Syncing a Schlage Smart Lock with the Mobile Manager is required when: 1. Assigning a new key card or fob 2. Un-assigning a key card or fob 3. Checking battery statusChange batteriesSchlage and Homebase recommend changing lock batteries annually. When the Schlage button blinks red even when no buttons have been pressed the battery is critically low and MUST be replaced. For more details on managing lock batteries please see our guide. How do I manage lock batteries?Let us know if you have any questions. We're here and happy to help!