Portable Power Source

FIG. 1 is a front perspective view of the portable power source, showing my new design; FIG. 2 is a rear perspective view thereof; FIG. 3 is a front elevational view thereof; FIG. 4 is a rear elevational view thereof; FIG. 5 is a left side view thereof; FIG. 6 is a right side view thereof; FIG. 7 is a top plan view thereof; FIG. 8 is a bottom plan view thereof; FIG. 9 is an enlarged view of detail 9 in FIG. 1 ; and, FIG. 10 is an enlarged view of detail 10 in FIG. 3 . The dashed broken lines illustrate portions of the portable power source which form no part of the claimed design. The dash-dot-dash broken lines are for notating enlarged views and form no part of the claimed design.