My buddy & I were flying our drones yesterday - he has a P3A and I have a MPP. He had one flight that was fine, then, on his second flight, shortly after taking off, he got a "Battery Error - landing" message. Luckily, he was able to get it back before it landed. The screen showed 86% charge remaining, so I think it is has problem where if one of the cells in the battery drops below a certain amount, the drone thinks it has a problem, so the safest thing to do is land. That is also his oldest battery (from 2017, not sure how many charges, but a bunch). It is also a genuine DJI factory battery. Is it true that if one of the battery cells drops below a certain voltage that the drone will initiate a landing?