THIS IS NOT THE FIRST TIME THIS HAPPENED!
I have built several quadcopters, so I decided to invest in a bunch of China Hobby Line batteries. (4s 1500mah 100c)
On four of my builds, They fly perfectly on other batteries, but as soon as I plug in one of these batteries, everything goes nuts!
I have tried everything that I can possibly do to make these work.
I ended up destroying a couple quadcopters trying to use these batteries.
I have changed motors, ESCs, Flight Controllers, added Low ERS capacitors, and tried every possible setting in Betaflight and BLHeli. (on FOUR builds!!!!)
I have narrowed down the problem to THESE BATTERIES!
You can see the difference when hovering.
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Your pids are too high for 4s. The chinda hobby line are a little heavier also . That’s not twitching you hear. It’s ossilations. Cut your p by 20%
Great idea with the battery wrap! Weird stuff going on with your quad! What motors are you running?
That beeping when you arm sounds like an error code.
https://github.com/martinbudden/betaflight/blob/master/docs/Buzzer.md
Looks like it might be Accelerometer Calibration fail. Also explains why it has problems flying correctly in angle mode.
What flight controller are you using? I have an old naze that the accelerometer has failed on. Angle mode no longer works, and it freaks out in Airmode as well. Not sure why they’re linked, but that’s the symptoms I have.
If you have an OSD, turn on the artificial horizon and see what it does. If it doesn’t behave correctly, then you know there’s a problem with the accelerometer.
Could also be a problem with gyro, too. Try calibrating both with stick commands when the quad is on the ground. Right stick down for both, left stick down and left for gyro, left stick up and left for accelerometer. Should get some flashes on the flight controller.