The ornamental design for a batterycharger for a vacuum cleaner, as shown and described.
FIG. 1 is a front, top and right-side perspective view of a battery charger for a vacuum cleaner showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a right-side view thereof;
FIG. 7 is a left-side view thereof;
FIG. 8 is a sectional view taken along line 8-8 in FIG. 2;
FIG. 9 is a sectional view taken along line 9-9 in FIG. 4; and,
FIG. 10 is a perspective view shown in a state of use.
The dash-dash broken lines shown illustrate both environment and portions of the battery charger for a vacuum cleaner that form no part of the claimed design. The dash-dot broken lines represent the bounds of the claimed design and form no part of the claimed design.