Is the flight path shown on the pH replay correct ?
One thing that leaps out of the log are the crazy negative heights, something definitely went wrong inside the drone.
If the drone is still under 1 year old I would submit the log and the DAT...
I don't really understand your post since I know of no way to calibrate the gimbal on computer but what occurs to me is .... have you inadvertently switch the gimbal to FPV mode ?
The problem you face is likely to be that the battery's control board, ( BMS ) has disconnected the charging terminals from the actual cells, if so external charge can not reach the cells.
Even opening the battery's case and charging the cells...
The things that caught my eye were the Vernier and the clawed hammer.....they just look odd, the Vernier looks very small and seems be measuring an appreciably thick handle on the tool box.
Now I have just noticed a Duracell PP3 with exposed...