Well maybe something else caused the battery to run away, and melt the shielding. What I do know is that something with that battery caused it to heat the wires up to the point it could short the switch, and send her in. When I say discharged, I don't mean run down to the point that it couldn't swing a voltmeter off zero. I used to have one of those hobbico voltmeters that would only read 4.8 & 9.6 volt. When it was in the red, it was time to recharge.