Portable backup power supply

Description

FIG. 1 is a front perspective view of a portable backup power supply, showing my new design;

FIG. 2 is a rear 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 an enlarged detail view of area 9 in FIG. 1.

The broken lines in the drawings illustrate the portions of the portable backup power supply, which form no part of the claimed design.

The dash-dot-dash broken lines encircling the enlarged views are for annotative purposes only and form no part of the claim thereof.

Claims

The ornamental design for a portable backup power supply, as shown and described.