FIG. 1 is a front perspective view of a USB battery charger, showing my design, with the USB battery charger in the closed condition;
FIG. 2 is a front elevational view thereof, with the USB battery charger in the closed condition;
FIG. 3 is a rear elevational view thereof, with the USB battery charger in the closed condition;
FIG. 4 is a left side elevational view thereof, with the USB battery charger in the closed condition;
FIG. 5 is a right side elevational view thereof, with the USB battery charger in the closed condition;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is front perspective view thereof, with the USB battery charger in the opened condition;
FIG. 9 is a front elevational view thereof, with the USB battery charger in the opened condition;
FIG. 10 is a rear elevational view thereof, with the prongs of the USB battery charger in the opened condition;
FIG. 11 is a left side elevational view thereof, with the USB battery charger in the opened condition; and,
FIG. 12 is a right side elevational view thereof, with the USB battery charger in the opened condition.