The ornamental design for a storagebattery, as shown and described.
FIG. 1 is a perspective view of the front, left and top sides of a storage battery showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a reference view of usage thereof.
The broken lines shown represent portions of the storage battery that form no part of the claim. Where the dot-dash broken lines abut the shaded surface it is understood that those broken lines represent an unclaimed boundary between claimed and unclaimed surfaces. None of the broken lines form any part of the claimed design.