We have a DJI s1000 Octocopter with a genuine cube orange, Mauch PL-200 sensor and Tattu 22000mAh 6S battery
I have just began flying it and getting a feel for such a large craft, and doing some gentle tuning, though ive input PIDs from another pixhawk s1000 and it flys not too bad as is.
the first long flight i conducted went very well, the voltage display was logical and i tuned and flew down to 10% soc, admittedly i had began landing at around 15% but decided my landing spot was less than ideal so moved on to a better spot.
the second flight, again everything was great and i spent a good amount of time flying figure 8s and moving up and down in altitude, until at around 30% i suddenly got a battery critical and bad battery error. the craft began increasing in altitude due to smart RTL but given the stark nature of the warnings i took back control and brought it down fairly quickly, bounced on the gear and broke a couple props but other than that no major damage. it didn’t seem to fly very well on the way down.
im pretty new to ardupilot/pixhawk and drones of this caliber and am hoping you more skilled people can help me nail down just what went wrong. ive attached both flight files and i note that for the same battery % the voltage is different. for the crash flight, were i watching the volts and not the % i would have seen the issue before the warnings kicked in but hindsight is 20/20.
the battery was pretty warm but i am unsure if this is due to the flight issue or the much higher drain than it should have seen
Logs available here - https://file.io/cOtErL0CLQox