FIG. 1 is a front, bottom, left perspective view of a rechargeable battery pack showing our new design;

FIG. 2 is a front, elevated view thereof;

FIG. 3 is a rear, elevated view thereof;

FIG. 4 is a right, elevated view thereof;

FIG. 5 is a left, elevated view thereof;

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

FIG. 7 is a bottom, plan view thereof.

The elements shown in dashed lines indicate unclaimed subject matter.