The ornamental design for an electronic cardbatterycharger, as shown and described.
FIG. 1 is a perspective view of an electronic card battery charger 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 plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a perspective view thereof, shown in an environment of use.
The broken lines shown in the figures are included for the purpose of showing portions of the electronic card battery charger or environmental subject matter that form no part of the claimed design.