Mobile Power Device

FIG. 1 is a front, top perspective view of a mobile power device, showing my new design; FIG. 2 is a rear, bottom perspective view thereof; FIG. 3 is a front elevation view thereof; FIG. 4 is a rear elevation view thereof; FIG. 5 is a left side elevation view thereof; FIG. 6 is a right side elevation view thereof; FIG. 7 is a top plan view thereof; FIG. 8 is a bottom plan view thereof; and, FIG. 9 is another perspective view of the mobile power device, shown in an alternative position. The broken lines in the figures illustrate portions of the mobile power device that form no part of the claimed design.