In an exemplary briefcase embodiment as depicted in FIG. 48, exemplary batteries (525) and (526) would be contained in very close proximity to an exemplary twelve-coil PMG assembly (300'). The exemplary twelve-coil PMG assembly (300') would comprise a twelve-coil stator (not visible) in between two rotors (e.g., 217b). In an exemplary briefcase embodiment, exemplary batteries (525) and (526) would be separated from the exemplary twelve-coil PMG assembly (300') by magnetic shielding, including internal side magnetic shielding (510); exemplary batteries (525) and (526) would be further shielded from the magnetic flux of the exemplary twelve-coil PMG assembly (300') by, for example, open-face magnetic shielding panel (511), magnetic shielding internally encased in the sides and bottom of main base casing (507), and by magnetically shielded conduit (not shown). In the exemplary briefcase embodiment, exemplary batteries (525) and (526) would abut, that is, would be adjacent, or closely adjacent, to one face of internal side magnetic shielding (510); portions of the exemplary twelve-coil PMG assembly (300') would abut, that is, would be adjacent, or closely adjacent, to the opposite face of internal side magnetic shielding (510). A single large pulley wheel (534) would be mounted on a drive shaft (503) that would be connected to a manually operated crank (not visible) to turn a small pulley wheel (531) with a single pulley V-belt (532). Rotation of the small pulley wheel (531) would in turn rotate the generator shaft (521) to turn the rotors (217b and 217a (not visible)) to generate power to be stored in exemplary batteries (525 and 526).