The Link Essential's battery guarantees the security of your installation for 24 hours in event of a power outage. You will receive a notification on your smartphone as soon as power is lost. The Link Essential continues to work locally in the event of a power outage. This means your home will remain protected, and your IntelliTAGs motion sensors will still trigger alerts and sound the alarms. You can change the site's arming status using your key fob or the keypad. If you've activated Somfy Around or subscribe to the backup connection, intrusion and self-protection alerts will be relayed.