The ornamental design for a shotgunshellshapedportableusb battery and car charger, as shown and described.
FIG. 1 is a front view of the shotgun shell shaped portable USB battery and car charger (may be same as back view);
FIG. 2 is a right-side view of the shotgun shell shaped portable USB battery and car charger;
FIG. 3 is a left-side view of the shotgun shell shaped portable USB battery and car charger;
FIG. 4 is a top-side view of the shotgun shell shaped portable USB battery and car charger;
FIG. 5 is a bottom-side view of the shotgun shell shaped portable USB battery and car charger;
FIG. 6 is a perspective view from top, front, and right side of the shotgun shell shaped portable USB battery and car charger;
FIG. 7 is a perspective view in an opened configuration from top, front, and right side of the shotgun shell shaped portable USB battery and car charger; and,
FIG. 8 is a perspective view in an opened configuration from bottom, front, and right side of the shotgun shell shaped portable USB battery and car charger.
The subject matter in broken lines forms no part of the claimed design.