An inflatable endurance unmanned vehicle includes an inflatable hull with at least one inflatable wing extending therefrom. The method further includes back drilling the signal via to create a center conductor hole above a remaining portion of the signal via and back drilling a shield opening in the board and at least part way into the at least one ground via such that a height of the center conductor hole is reduced. The sensor detects temperature, current, and open circuit voltage of the battery. At least one of the two side walls of each of the protrusions is oriented to be inclined at a preselected angle to the orientation of the spring pressure.