I have retry my MMM,
just 13.2V A123, MMM no other electronics...
ON and just a little little white smoke come here by the hole in the center of the red circle:
I have try it like 5 times, juste a little white smoke. After the 5th time, no more smoke...
Just the 3 Led who flash a lot quickly than a normal MMM
The Castle link work perfectly...
After that i have tested with a radio system. no answer, just a lot lot lot of led flashing...
Dead.