The ornamental design for a rechargeabledigitalscale, as shown and described.
FIG. 1 is a front left perspective view of a rechargeable scale hereof in an open position, the right side being a mirror image thereof the rechargeable unit being omitted for ease of illustration;
FIG. 2 is a front right perspective view of a rechargeable scale hereof in a closed position inserted in the charger base, the left side being a mirror image thereof; and,
FIG. 3 is a front plan view of a rechargeable scale hereof in a closed position inserted in the charger base.