Quadcopter beeping ESCs

Name: Quadcopter beeping ESCs
Uploaded: 2017-12-05T04:20:23+02:00
Description: My first quadcopter build. Trying to use NCR18650b batteries. I'm using 40Amp ESCs and they just keep beeping. What seems to be the issue?

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My first quadcopter build. Trying to use NCR18650b batteries. I'm using 40Amp ESCs and they just keep beeping. What seems to be the issue?