A plate shaped battery pack includes: a power generating element sealed by a wrapping member formed in the shape of a wrapper constructed of a laminated film; an anode terminal and a cathode terminal connected to the power generating element and extending from almost a middle portion thereof; and an exterior member. The housing includes a plurality of passageways extending therethrough for engagingly accommodating corresponding terminals. In one embodiment, each of the bladders is connected together so that inflation of one bladder provides fluid pressure to all of the bladders. The seat is mounted on the stand. The gauge eliminates the guesswork in determining trueness of the edge for given blade curvatures along the periphery of the blade. In one particular embodiment, a display screen for a display is discussed.