Charging base for robot vacuum cleaner

1. Charging base for robot vacuum cleaner

1.1 is a front view of a charging base for a robot vacuum cleaner showing our new design;

1.2 is a rear view thereof;

1.3 is a left view thereof;

1.4 is a right view thereof;

1.5 is a top view thereof;

1.6 is a bottom view thereof;

1.7 is a front, left and top perspective view thereof; and

1.8 is another perspective view thereof.

Features shown within the broken lines do not form a part of the claimed design.