FIG. 1 is a bottom plan view of a battery case for smart phone showing my design therefor;
FIG. 2 is a right side elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a front elevational view thereof, showing a camera opening in dashed lines, which opening does not form a part of the claimed design;
FIG. 7 is a top, front, right side perspective view thereof;
FIG. 8 is a right side, front perspective view of a second embodiment of a battery case for smart phone for use with a different smartphone, also showing a camera opening, a smartphone covering case, and a connector cord for connecting a smartphone to the battery case for smart phone. The camera opening, smartphone covering case, and a connector cord are shown in dashed lines for context, and do not form a part of the claimed design;
FIG. 9 is a bottom plan view of a second embodiment of a battery case for smart phone;
FIG. 10 is a right side elevational view thereof;
FIG. 11 is a rear elevational view thereof;
FIG. 12 is a left side elevational view thereof;
FIG. 13 is a top plan view thereof;
FIG. 14 is a front elevational view thereof, showing a camera opening in dashed lines, which opening does not form a part of the claimed design; and,
FIG. 15 is a back, bottom, right side perspective view thereof.