Nope ... "breaking in" is an older kind of myth that never have been proven in figures. If any positive long term effect can be seen at all, your batteries have been taken out of duty a long time before that due to other reasons.I had heard that it was recommended/important to cycle new batteries before use...
It shouldn’t hurt, but it certainly isn't required for proper battery activation and normal useful life. If it was, DJI would certainly require it. I, too, have never had any premature battery failures in 7 years, without doing it, but I also upgrade my aircraft every two years.Might never been proven but I all ways have with all my drones
made sure and made sure they were topped of then flew them till they autolanded Then did so after I flew them awhile. Has always worked good for me but everyone has a opinion. That is mine and only had 1 issue in 7 years and was a bad battery and did crash.
DJI did replace my drone which was a P2V but that’s just the way I do it.
I upgrade mine whenever there is oneIt shouldn’t hurt, but it certainly isn't required for proper battery activation and normal useful life. If it was, DJI would certainly require it. I, too, have never had any premature battery failures in 7 years, without doing it, but I also upgrade my aircraft every two years.