1. The Best ttlock smart locks for home users generally have spare long keys, which are similar to common ordinary keys. Then find the keyhole of the fingerprint lock at the bottom, and some fingerprint locks have the keyhole above the handle, depending on different fingerprint locks.
2. Insert the key into the keyhole of the Best ttlock smart locks, and push it up hard, then the door will automatically open. Because the battery box is replaced inside the door, first go inside.3. There is a screw hole above the other side of the Best ttlock smart locks for home users. This black part is the battery box, which can be unscrewed with a screwdriver.
5. Take out the prepared battery and replace it with the Best ttlock smart locks, then cover the cover. The holes on the cover should be aligned with those on the fingerprint lock, otherwise, the screws will not be able to be installed.
6. Then tighten the screws of the Best ttlock smart locks for home users to secure the cover. Finally, go outside the door and open the cover of the fingerprint lock, you will find that the fingerprint lock has been lit and can be used normally.