Power Tool Battery

FIG. 1 is a rear, bottom, and left side perspective view of a power tool battery showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG, 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

Broken lines in the drawings depict portions of the power tool battery that form no part of the claimed design.