I bought a P3A second hand, with 2 good batterys (i thought) After some flights, i had a major crash, drone just lost all power. Props and gimbal broken. Gimbal is repaired, i have a 3D printer, and could print the broken gimbal arms, and of course a new cable. I don't have a receipt, so warranty was at least "difficult", and i repaired it myself, now i am on my own ;-) Battery was 100% on start, 98% on crash, less then a flight minute later. The complete log is here: HealthyDrones.com - Innovative flight data analysis that matters I could see that this battery gave many critical errors. Also a log of another flight (no crash, but still questionable): HealthyDrones.com - Innovative flight data analysis that matters My 2 other batteries are fine, no errors there. The crash happened the day before the new firmware came out. Unlucky me probably. Seems this is the solution for these errors. Now i am in doubt to use this battery anymore. But it is almost like new. But would the new firmware not take care of this problem? (oh yes, forgot, i also discharged it until 8%, did not cure the errors) I flew a couple of times with this battery since the repair, everything seems fine. What would you people do? Greetings and a happy newyear!