The ornamental design for an electricshaverhead, as shown and described.
FIG. 1 is a bottom perspective view of an electric shaver head showing my new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a front elevational view thereof, the rear, left and right side elevational views being identical thereto; and,
FIG. 5 is an elevational view thereof taken from the right front corner, the left front corner, right and left rear corner elevational views being identical thereto.
The matter shown in phantom lines is for environmental purposes only and does not form part of the claimed design.