Autel Robotics EVO II Dual 640T Enterprise Bundle V3 Drone with Thermal Imaging - Manual (Page 25)

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 Low aircraft battery
The failsafe is triggered whenever one of the following errors occurs:
The aircraft continuously calculates the battery power required for returning to the
home point. If the battery power is sufficient for the aircraft to return to the home
point, the App will show a notification. The failsafe will be activated and the aircraft
will start the auto-return process. In the meantime, you can press the Pause button
(
) to regain control over the aircraft.
A. When the battery level of the aircraft reaches the set threshold (25% by default),
you will receive a low battery warning, the failsafe is activated, and the aircraft will
automatically return to the home point. If you regain control over your aircraft, when
the battery level reaches 15%, you will receive a critically low battery warning and
the aircraft will automatically land in the current place. For any emergency, press
the Pause button
( ) to stop landing and manually fly the aircraft to the nearest
safe landing point.
Note
 When the battery level of the aircraft reaches 25% (low battery warning), if the
horizontal distance between the aircraft and the home point is less than 50
meters (150 ft), the aircraft will not execute the auto-return operation.
 If no GPS signal is available when a low battery warning is displayed, the aircraft
will not execute the auto-return operation. The aircraft will enter the ATTI mode
and continue to be controlled by you. When the battery level reaches 15%
(critically low battery warning), the aircraft will land automatically.