Power supply device for electronic cigarette

FIG. 1 is a front elevational view of a power supply device for electronic cigarette showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front, right, and top perspective view thereof; and,

FIG. 8 is a rear, left, and bottom perspective view thereof.

The broken (dashed) lines show portions of the power supply device for electronic cigarette that form no part of the claimed design.