Has there been an update to the second garage fire? If you know more then you should post up the information. The last I heard was "In this particular case, we don't yet know the precise cause, but have definitively determined that it did not originate in the battery, the charging system, the adapter or the electrical receptacle, as these components were untouched by the fire."
If that is true then that that leaves. 1) the car batteries 2) something that was brought into the vehicle 3) something external to the vehicle 4) ?????
Slashdotters love good coverup stories, etc but you gotta back them up with more than headlines.