Hello, here is what i found,
i forgot to put the crashbar down last time i used the tbm, naturally the battery was dead when i came back the day after.
But pressing the button to close the rear door still worked and in a strange manner the dor closed instantly and a second press on the close door button would open it up again.
Here is the video of this from my stream. https://www.twitch.tv/videos/v339829546?t=248s
as the system to close the door is electric, i guess the button shouldn’t have any action in case the battery is out of service.