The ornamental design for a digital displaybattery, as shown and described.
The file of this patent contains at least one drawing/photograph executed in color. Copies of this patent with color drawing(s)/photograph(s) will be provided upon request and payment of the necessary fee.
FIG. 1 is the front view of a digital display battery.
FIG. 2 is the rear view thereof;
FIG. 3 is the top view thereof;
FIG. 4 is the left view thereof;
FIG. 5 is the right view thereof;
FIG. 6 is the perspective view thereof; and,
FIG. 7 is a perspective view thereof, while in use.