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Battery
Do NOT fly if the battery appears dead or a problem is suspected. Low battery signs should NOT be ignored and the drone should be landed ASAP
Phone
The DJI link uses WiFi from a mobile device to control the drone. If the WiFi link or phone appears to be unreliable or not responsive to commands, the drone should not be flown.
Props
The DJI props fold - ensure that they are able to freely unfold