Portable Power Supply

FIG. 1 is a front, right and top perspective view of a portable power supply showing our new design;

FIG. 2 is a rear, left and top perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is another front perspective view thereof, showing a ring of the portable power supply in an open state.

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