How do I perform a factory reset?

To perform a factory reset, follow these steps:

Anduril (V1 & V2 — identical):

1. From Off mode, you can either loosen the tailcap, hold the button, and then tighten the tailcap, or press 13H and keep holding for about 4 seconds.
2. If using the 13H method, count the clicks like music to make it easier: For Anduril V1: 1 2 3 4 1 2 3 4 1 2 3 4 HOLD For Anduril V2: 1 2 3 4 2 2 3 4 3 2 3 4 HOLD
3. Keep holding the button until the light reaches full power to complete the reset, or release early to abort.

Biscotti (12-Group): This feature does not exist in Biscotti firmware.

Source: Anduril V1 Manual — Simple UI ; Anduril V2 Manual — Factory Reset