If only Aku (outdoor unit) is out of battery:
Method 1: Use the app to unlock Aku Inside (indoor unit).
Note: This function works via Bluetooth, so please make sure you are near the lock.
Method 2: Connect a power bank to the Emergency Port (USB-C or Micro-USB) located at the bottom of the device. Then press the Reset button to restart the device.
If Aku Inside (indoor unit) is out of battery:
Method 1: Use the Mechanical Key to unlock the door.
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