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.