I have offered up one Motorola Car charger (SPN5400A) and one Motorola USB Charging/Data cable (SKN6238A) to "the experiment" in the name of seeking a solution.
You may be (I certainly was) surprised to discover this: the Motorola Car charger is rated at 950mA output, however... only the red and black wires are sent to the 5pin microUSB connector that connects to the phone.
So if the LGS were to detect that the charger was capable of delivering more current than that by a typical USB connection to a computer... see: Universal Serial Bus - Wikipedia, the free encyclopedia
that wasn't going to happen with this charger without some modding, hence the need for a charger and another cable for the experiment.
Heh heh. More later.