Portable Power Source

FIG. 1 is a top front perspective view of a portable power source according to my new design;

FIG. 2 is a bottom front perspective view thereof;

FIG. 3 is a front side view thereof;

FIG. 4 is a rear side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a top front perspective view of a portable power source with the handles in the up position.

The broken lines shown in the drawings illustrate portions of the portable power source that form no part of the claimed design.