Never use modern complex power cells without a BMU. Under different circumstances a discovery I made could have been fatal. There is still a positive potential between battery plus and earth ground through your soldering iron. Why this did not occur to me before fusing my tip to the gold connector I was soldering I dont know. I'm sure many engineers have wondered, as the light left their eyes, why they didnt consider some simple facts. I think I am going to follow the probe resistor acumen and no longer connect main power directly but lead in with a small resistive connection. The Anderson Power Pole is a great connector but it evaporated after repeated high power connections so I employed the gold connector standard. In actuality, there will probably be no need to disconnect the battery as there is a separate XLR charging plug connected to BMU. Eventually, ROSCOE will find his own recharging station using a design yet to be determined.